: The strings of accented characters (like зІѕжќ± ) are likely Cyrillic letters that have been mangled during a download or file transfer.
If you need to know what this video actually is, you can try the following:
: This looks like a specific internal release code , series ID , or tracking number used by the uploader or a content distribution system.
Converting "болно" to Cyrillic - Stack Overflow
: This is a standard MPEG-4 Part 14 video container used for storing video, audio, and subtitles. How to Fix or Identify the Content