No public guide exists for the specific file "2023.02.07 LDTHO.mp4," which likely represents a dated file, possibly using "LTO" for archive, a standard in video production. Custom thumbnails can be added to MP4 files using tools like MP3Tag or by updating media information in VLC. For more details, visit Promax Systems .

How to Add Custom Thumbnails aka Cover Art to MP4 Files on Windows