Changing the hash of large files?

Question

Video

There are a couple of thousand videos (about 5tb)
Each video is 300-1000 mb
It is necessary to upload it all to VK
Some of these videos are blocked It is
necessary to change the hash of all videos from the archive and upload
How to do this?
Used hashmanager for images, everything is fine. But with the video, all this happens for a very long time .. I
considered the idea with a watermark.
Advise gentlemen

Answer 1

In order for the md5 hash to be different, it is enough to change 1 byte. Only something tells me that they do not check by md5.