Since there is no "Export" button in the AnyDesk client, the most common and reliable way to get an MP4 is to using third-party software.
: Play the video at normal speed (1x) during the conversion process to ensure no frames are dropped.
Ensure you have the latest version of VLC Media Player installed.
ffmpeg -i input_filename.anydesk -c:v libx264 -preset slow -crf 22 -c:a aac output_filename.mp4