This is the most common suggestion. You play the recording in the AnyDesk client and use OBS Studio or the Windows Game Bar (Win+G) to capture the playback in real-time as an MP4.
However, there is a recurring frustration among users: AnyDesk saves its recordings in a proprietary format, typically with the extensions or .adrec (depending on the version). These files are not playable in standard media players like VLC, Windows Media Player, or QuickTime. Convert Anydesk Video To Mp4 -UPD-
Avoid uploading sensitive AnyDesk recordings to unknown online converters. This is the most common suggestion
Renaming recording.anydesk to recording.mp4 will never work. You must (transcode/remux) it properly. Windows Media Player