diff --git a/README.md b/README.md
index ca7cefc..2818c91 100644
--- a/README.md
+++ b/README.md
@@ -6,20 +6,24 @@ This software is provided without warranty. Usage is discouraged! Usage of this
 ## Usage
 
 ```bash
-usage: dl [-h] [--outDir OUTDIR] [--starterUrl STARTERURL]
-          [--startAt STARTAT]
-          courseId
+usage: dl.py [-h] [--out-dir OUT_DIR] [--starter=url STARTER=URL] [--start-at START_AT] [--auth-token AUTH_TOKEN]
+             [--session-id SESSION_ID] [--session-ci SESSION_CI]
+             course-id
 
 Download clips from a course
 
 positional arguments:
-  courseId                  Course ID
+  course-id             Course ID
 
 options:
-  -h, --help                show this help message and exit
-  --outDir OUTDIR           Output directory
-  --starterUrl STARTERURL   Starter URL
-  --startAt STARTAT         Skip all previous indizes (starts at 1)
+  -h, --help            show this help message and exit
+  --out-dir OUT_DIR     Output directory
+  --starter=url STARTER=URL
+                        Starter URL
+  --start-at START_AT   Skip all previous indices (defaults to 1)
+  --auth-token AUTH_TOKEN
+  --session-id SESSION_ID
+  --session-ci SESSION_CI
 ```
 
 ## Procedure
diff --git a/dl b/dl
index 9546d0d..3a28b50 100755
--- a/dl
+++ b/dl
@@ -1,39 +1,14 @@
-#!/usr/bin/env python3
-from lib import *
-import sys
-import os
-import argparse
+#!/bin/env fish
 
+set DIR (cd (dirname (status -f)); and pwd)
 
-def parse_args():
-    parser = argparse.ArgumentParser(
-        description='Download clips from a course',
-    )
+if ! test -d "$DIR/venv"
+  /bin/env python3 -m venv "$DIR/venv"
+  . "$DIR/venv/bin/activate.fish"
+  /bin/env python3 -m pip install -r "$DIR/requirements.txt"
+  echo
+else
+  . "$DIR/venv/bin/activate.fish"
+end
 
-    parser.add_argument('courseId', type=str, help='Course ID')
-    parser.add_argument('--outDir', type=str,
-                        help='Output directory', default='./out')
-    parser.add_argument('--starterUrl', type=str,
-                        help='Starter URL', default="https://www.fau.tv/auth/sso")
-    parser.add_argument('--startAt', type=int,
-                        help='Skip all previous indizes (starts at 1)', default=1)
-
-    return parser.parse_args()
-
-
-def main():
-    args = parse_args()
-
-    load_token(args.starterUrl)
-
-    os.makedirs(args.outDir, exist_ok=True)
-
-    for index, clip_id in enumerate(get_course_clip_ids(args.courseId)):
-        if index < args.startAt - 1:
-            continue
-
-        download_clip(clip_id, f'{args.outDir}/{index+1: 04d}_{clip_id}.mp4')
-
-
-if __name__ == '__main__':
-    main()
+/bin/env python3 "$DIR/dl.py" $argv
diff --git a/dl.py b/dl.py
new file mode 100644
index 0000000..00c75fb
--- /dev/null
+++ b/dl.py
@@ -0,0 +1,44 @@
+from lib import *
+import os
+import argparse
+
+
+def parse_args():
+    parser = argparse.ArgumentParser(
+        description='Download clips from a course',
+    )
+
+    parser.add_argument('course-id', type=str, help='Course ID')
+    parser.add_argument('--out-dir', type=str,
+                        help='Output directory', default='./out')
+    parser.add_argument('--starter=url', type=str,
+                        help='Starter URL', default="https://www.fau.tv/auth/sso")
+    parser.add_argument('--start-at', type=int,
+                        help='Skip all previous indices (defaults to 1)', default=1)
+
+    parser.add_argument('--auth-token', type=str)
+    parser.add_argument('--session-id', type=str)
+    parser.add_argument('--session-ci', type=str)
+
+    return parser.parse_args()
+
+
+def main():
+    args = parse_args()
+
+    if args.authToken and args.sessionID and args.sessionCI:
+        set_token(args.authToken, args.sessionID, args.sessionCI)
+    else:
+        load_token(args.starterUrl)
+
+    os.makedirs(args.outDir, exist_ok=True)
+
+    for index, clip_id in enumerate(get_course_clip_ids(args.courseId)):
+        if index < args.startAt - 1:
+            continue
+
+        download_clip(clip_id, f'{args.outDir}/{index+1: 04d}_{clip_id}.mp4')
+
+
+if __name__ == '__main__':
+    main()
diff --git a/lib.py b/lib.py
index b954f84..677eae4 100644
--- a/lib.py
+++ b/lib.py
@@ -1,4 +1,3 @@
-from selenium import webdriver
 import time
 from dataclasses import dataclass
 import requests
@@ -57,9 +56,16 @@ class ClipDetails():
         ] if url is not None]
 
 
+def set_token(auth_token: str, session_id: str, session_ci: str):
+    global _token
+    _token = Token(auth_token, session_id, session_ci)
+
+
 def load_token(auth_url: str):
     global _token
 
+    from selenium import webdriver
+
     driver = webdriver.Firefox()
 
     driver.get(auth_url)
@@ -165,5 +171,6 @@ def download_clip(clip_id: str, outfile_path: str):
 
     if len(details.playlist_urls()) > 0:
         playlist_url = details.playlist_urls()[0]
-        print(f"Trying to download clip {clip_id} using playlist url {playlist_url}")
+        print(
+            f"Trying to download clip {clip_id} using playlist url {playlist_url}")
         download_playlist(playlist_url, outfile_path)
diff --git a/pyvenv.cfg b/pyvenv.cfg
deleted file mode 100644
index ec986ab..0000000
--- a/pyvenv.cfg
+++ /dev/null
@@ -1,5 +0,0 @@
-home = /usr/bin
-include-system-site-packages = false
-version = 3.12.4
-executable = /usr/bin/python3.12
-command = /usr/bin/python -m venv /home/ludwig/git/fau-tv-dl
diff --git a/requirements.txt b/requirements.txt
index fdd089e..ae62ce7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
 selenium
-requests
\ No newline at end of file
+requests