Its too general, it really depends whether its your video and whether its on youtube or not.
If its not your video and you cant use "actual" tracking or analytics, your best bet is just posting the video link in SEMRush and go to Backlinks.
or regular google video search with same or similar Headline.
If its on youtube, and it is yours, there is something called Content ID - it notify you if someone uses a piece (or all) of your content.