You can report plagiarism here: https://steemcleaners.org/abuse-report/

But it seems like he justed used screenshots from your video, did he ? With image plagiarism steemcleaners just deals if it is published under an artistic tag like #photography or #art.

Plagiarism means that the text is stolen. You can report him for this in the case you can proof it.

Greets Naturicia