I received no notification for your comment on my photo, Robin.
Now that we have the issue narrowed down a little, we know it's a coding issue related to comments on media items, not a 'video' or 'audio' function issue specifically.
I'm going to see if I can get help locating the exact problem tomorrow. Usually this kind of thing is a matter of one of my custom modules needing updating in order to function correctly again with another module, like it used to.
Thank you so much Robin for noticing this, and for helping me test out where exactly this is happening (and not happening).
It's often hard to notice something that's missing, as opposed to some obvious problem that's immediately visible..
I'll respond back here when I find out more, hopefully tomorrow sometime.
Those irritated by grain of sand best avoid beach.
-Strumelia proverb c.1990