diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d61c4a3
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,178 @@
+# Created by https://www.toptal.com/developers/gitignore/api/python,venv
+# Edit at https://www.toptal.com/developers/gitignore?templates=python,venv
+
+### Python ###
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
+
+### venv ###
+# Virtualenv
+# http://iamzed.com/2009/05/07/a-primer-on-virtualenv/
+[Bb]in
+[Ii]nclude
+[Ll]ib
+[Ll]ib64
+[Ll]ocal
+[Ss]cripts
+pyvenv.cfg
+pip-selfcheck.json
+
+# End of https://www.toptal.com/developers/gitignore/api/python,venv
diff --git a/example.py b/example.py
new file mode 100644
index 0000000..a21c8d3
--- /dev/null
+++ b/example.py
@@ -0,0 +1,33 @@
+from pathlib import Path
+from ilias_sync2 import Synchronizer
+
+base_path = Path("/home/jo/Uni2")
+cloud_computing = base_path / "Cloud-Computing"
+discrete_optimization = base_path / "Discrete-Optimization"
+distributed_system_i = base_path / "Distributed-Systems-1"
+modern_cryptography = base_path / "Introduction-to-Modern-Cryptography"
+uebertragungstechnik_1 = base_path / "Übertragungstechnik-1"
+loose_coupling = base_path / "Loose-Coupling"
+info_vis = base_path / "Information-Visualization"
+info_vis_exercise = base_path / "Information-Visualization-Exercise"
+
+directories = [
+               (cloud_computing,
+                "https://ilias3.uni-stuttgart.de/goto_Uni_Stuttgart_crs_2623454.html"),
+               (discrete_optimization,
+                   "https://ilias3.uni-stuttgart.de/goto_Uni_Stuttgart_crs_2642312.html"),
+               (modern_cryptography,
+                   "https://ilias3.uni-stuttgart.de/goto_Uni_Stuttgart_crs_2573315.html"),
+               (uebertragungstechnik_1,
+                   "https://ilias3.uni-stuttgart.de/goto_Uni_Stuttgart_crs_2564663.html"),
+               (distributed_system_i,
+                   "https://ilias3.uni-stuttgart.de/goto_Uni_Stuttgart_crs_2572756.html"),
+               (loose_coupling,
+                   "https://ilias3.uni-stuttgart.de/goto_Uni_Stuttgart_crs_2572802.html"),
+               (info_vis,
+                   "https://ilias3.uni-stuttgart.de/goto_Uni_Stuttgart_crs_2573138.html"),
+               (info_vis_exercise,
+                   "https://ilias3.uni-stuttgart.de/goto_Uni_Stuttgart_crs_2573225.html"),
+                ]
+
+Synchronizer("st123456", r"yourpasswordhere", directories).synchronize()
diff --git a/ilias_sync2/main.py b/ilias_sync2/main.py
index 2b1c12b..3d40669 100644
--- a/ilias_sync2/main.py
+++ b/ilias_sync2/main.py
@@ -7,6 +7,7 @@ from urllib.parse import urljoin
 
 import requests
 from bs4 import BeautifulSoup
+from pathvalidate import sanitize_filepath
 
 from .utils import ContentDisposition, heading_sanitization
 
@@ -68,11 +69,11 @@ class CrawlObject():
     def request_head(self) -> requests.Response:
         return self.request(method="HEAD")
 
-    def request_get(self) -> requests.Response:
-        return self.request(method="GET")
+    def request_get(self, **kwargs) -> requests.Response:
+        return self.request(method="GET", **kwargs)
 
-    def request(self, method="GET") -> requests.Response:
-        response = self.session.request(method=method, url=self.url)
+    def request(self, method="GET", **kwargs) -> requests.Response:
+        response = self.session.request(method=method, url=self.url, **kwargs)
         if response.status_code != requests.codes.ok:
             raise RequestError(f"Error getting '{ method }' for { self.url }",
                                response)
@@ -114,6 +115,8 @@ class CrawlObject():
                 logging.info(f"Improving filename from '{ self.path.name }' to '{ disposition_obj.filename }'")
                 self.path = self.path.parent / disposition_obj.filename
 
+        # self.path = Path(sanitize_filepath(self.path))
+
     def process_items(self) -> None:
 
         subitems = list()
@@ -131,17 +134,17 @@ class CrawlObject():
 
                 items = block.find_all("div", class_="il_ContainerListItem")
                 for item in items:
-                    #logging.debug(item.prettify())
+                    # logging.debug(item.prettify())
                     link = item.find("a")
                     if link is None:
                         continue
-                    name = link.text
+                    name = sanitize_filepath(link.text)
                     url = link.attrs["href"]
                     url = urljoin(self.url, url)
 
                     if url in self.discovered:
-                        continue
                         logging.info(f"{ url } already discovered, skipping it")
+                        continue
                     self.discovered.add(url)
                     subitems.append(CrawlObject(self.path / heading_sanitization(heading) / name,
                                                 url,
@@ -158,7 +161,7 @@ class CrawlObject():
                     name_element = name.find("a")
                     if link_element is not None and name_element is not None:
                         link = link_element.attrs["href"]
-                        name = name_element.text + ".mp4"  # rough estimate that all files are mp4
+                        name = sanitize_filepath(name_element.text + ".mp4")  # rough estimate that all files are mp4
                         url = urljoin(self.url, link)
 
                         path = self.path / name
@@ -193,7 +196,7 @@ class CrawlObject():
                             logging.info("number of divs in formgroup != 2, dont know what to do.")
                             continue
 
-                        name = name_div.text
+                        name = sanitize_filepath(name_div.text)
                         link = link_div.find("a")
                         if link is None:
                             continue
@@ -220,6 +223,45 @@ class CrawlObject():
 #                    href = a_element.attrs["href"]
 #                    logging.info(href)
 
+            # find the il-card thumbnail videos
+            for item in content.find_all("div", class_=["il-card", "thumbnail"]):
+                captions = item.find_all("div", class_="caption")
+                if captions is None:
+                    logging.debug("no captions found")
+                    continue
+
+                if len(captions) < 3:
+                    logging.debug(f"to few captions found: { len(captions) }")
+                    continue
+
+                heading = captions[0].find("a")
+                if heading is None:
+                    logging.debug(f"No <a> found in { captions.prettify() }")
+                    continue
+
+                name = heading.text
+
+                logging.debug(f"Found Heading: { name }")
+
+                name = sanitize_filepath(name + ".mp4")
+
+                link = captions[2].find("a")
+                if link is None:
+                    logging.debug("No <a> found in { link.prettify() }")
+                    continue
+
+                url = link.attrs["href"]
+
+                if url in self.discovered:
+                    logging.info(f"{ url } already discovered, skipping it")
+                    continue
+                self.discovered.add(url)
+                subitems.append(CrawlObject(self.path / name, url, self.session, discovered=self.discovered))
+
+
+                
+
+
         for item in subitems:
             item.process()
 
@@ -231,14 +273,15 @@ class CrawlObject():
         If needed the directories are created.
         """
 
-        content = self.request_get().content
+        response = self.request_get(stream=True)
 
         if not self.path.parent.is_dir():
             self.path.parent.mkdir(parents=True, exist_ok=True)
 
         logging.info(f"Writing to file '{ self.path }'.")
         with open(self.path, "wb+") as f:
-            f.write(content)
+            for chunk in response.iter_content(chunk_size=10*(2**10)):
+                f.write(chunk)
 
     def update_requiered(self) -> bool:
         """
@@ -266,7 +309,25 @@ class Synchronizer:
         self._session = requests.Session()
 
         # fill the session with the correct cookies
-        self._session.get(f"{ BASE_URL }/login.php?target=&client_id=Uni_Stuttgart&cmd=force_login&lang=en")
+        login_page = self._session.get(f"{ BASE_URL }/login.php?target=&client_id=Uni_Stuttgart&cmd=force_login&lang=en")
+
+        login_page = BeautifulSoup(login_page.content)
+
+        login_form = login_page.find("form", attrs={"name": "formlogin"})
+
+        if login_form is None:
+            logging.error("Login failed, login form not found!")
+            exit(1)
+
+        logging.debug(login_form)
+
+        login_url = login_form.attrs.get("action")
+
+        if login_url is None:
+            logging.error("Could not find the action URL in the login form!")
+            exit(1)
+
+        logging.debug(f"Login URL: {login_url}")
 
         login_data = {
                 "username": self.username,
@@ -275,7 +336,8 @@ class Synchronizer:
                 }
 
         # do the actual login
-        self._session.post(f"{ BASE_URL }/ilias.php?lang=en&client_id=Uni_Stuttgart&cmd=post&cmdClass=ilstartupgui&cmdNode=123&baseClass=ilStartUpGUI&rtoken=", data=login_data)
+        self._session.post(f"{ BASE_URL }/{ login_url }",
+                           data=login_data)
 
     def synchronize(self):
 
diff --git a/ilias_sync2/utils.py b/ilias_sync2/utils.py
index 279f4ef..106ebc2 100644
--- a/ilias_sync2/utils.py
+++ b/ilias_sync2/utils.py
@@ -2,6 +2,8 @@ import re
 from typing import Optional
 from dataclasses import dataclass
 
+from pathvalidate import sanitize_filepath
+
 @dataclass
 class ContentDisposition:
 
@@ -33,5 +35,6 @@ def heading_sanitization(heading: str) -> str:
     if heading == "Inhalt":
         return ""
 
-    return heading
+    return sanitize_filepath(heading)
+
 
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..b707cea
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,10 @@
+beautifulsoup4==4.10.0
+bs4==0.0.1
+certifi==2021.10.8
+charset-normalizer==2.0.9
+idna==3.3
+-e git+ssh://git@git.srvspace.net/jo/ilias-sync2.git@b74c19af044e6fbd89432d073030094f53cda078#egg=ilias_sync2
+pathvalidate==2.5.0
+requests==2.26.0
+soupsieve==2.3.1
+urllib3==1.26.7