Files with h4v file extension are used as standard for video compression.
H4V file extension - H.264 / MPEG-4 AVC
What is h4v file? How to open h4v files?
File type specification:
The h4v file extension is related to the H.264/AVC/MPEG-4 part 10 (Advanced Video Coding) a standard for video compression. The final drafting work on the first version of the standard which was completed in May 2003.