i have a feeling that YouTube detection bots is targeting your comments and take them down...
anyway there is a fresh blackhat trick that you can use to disable his videos from embedding
not sure if this the right place to share that trick... but i guess what the hell... the world is about to end and this is BHW
so first i must say that YouTube for many years didn't took any active punishment measures for videos that used cheap LQ traffic, all they did is to delete those views (within a few days AKA 'drops')
in the past they used to delete videos, but that was years ago, that allow anyone to target any video and take it down....
so... since the last update (two weeks ago) YouTube crackdown on videos that been promoted with cheap views, those video get their embed option disabled
it is possible to check a video if it has the embed option enabled or disables, just by typing this URL:www youtube com /embed/XXXXXXXXXXX
and clicking the play button!
if you disable the embed option of a video it will immediately lose organic traffic (if it was embedded on other sites), it will stop any cheap traffic campaign that based on embedded ads, it will stop any google ads campaigns...
i will not point to that toxic cheap traffic, you will need to find that for yourself.
also remember that karma is a beach, if you do that to his videos... he can do that to your video
i hope that YouTube will patch that exploit soon, since it can be abused (or maybe only if it will be abused they will consider to patch it)