Why stop at video? Every application that creates any file should take a hash of it and upload it to a public blockchain. You could use it to identify tampering

Why stop at video? Every application that creates any file should take a hash of it and upload it to a public blockchain. You could use it to identify tampering with any individual file. If deployed more broadly (e.g., on the file system level), you could easily identify if your systems have been hacked.