So you're likely a relative, a neighbor, a co-worker or some other quantity potentially known to him, provided these videos are candid.A few videos where hes autistically sitting on his bike with some country ass music.
If so, it would be inadvisable to post them. We aren't the only autists on the internet. If he "knows the system" as you say it sounds as though he may have what he needs to piece together who's uploading something.
Then again, if you really want to poke the bear, many laughs have been had at the expense of cows who scream at Dear Leader to take down content.