I ll give you an even better idea for a youtube extension, if nobody makes it, i ll most certainly do. I need to pin a particular comment on a set of videos matching a criteria and change this pinned comment across all these videos every now and then, like for example when i put a new video out, i would like to link to this from the pinned comment of relevant videos. this is such a hassle doing manually in current times. i am amazed nobody has come up with a pinned comment manager for youtube yet