These are best for quick edits if your file size is under certain limits (usually 500MB to 1GB):

: A high-quality tool that allows you to stitch clips together and trim them directly in your browser.

Since a full movie like Blutzbrüdaz is likely a large file, desktop software is more reliable:

: Highly recommended for beginners who want professional-looking transitions between clips.

: You can use the "Create New Project" feature in the Photos or Clipchamp apps to select your MP4 files and save them as a single video.

: Works on all operating systems (Windows, Mac, iOS, Android) and supports files up to 500 MB for free.

To "put together" or merge a video file like with other clips, you can use several free and accessible tools depending on your platform. Quick Online Tools (No Installation)

: A dedicated video joiner that can combine multiple large files into one without losing quality. Merge MP4 Videos: Combine MP4 Files for Free Online - Adobe