My DP watches videos on fb I would say about 80% of his time. On the toilet, while sitting on the couch watching tv, even on a car journey once he pulls up to where we are going or at home he whips his phone out to watch a video nearly always on full volume. They are always specifically long winded ones where couples prank each other, or people who think they are doing something utterly hilarious and shrieking in the video every 10 seconds for 20 mins.
I do watch my instagram stories a few times a day and occasional fb videos (I'm not a fan of them and if I do watch them i will often watch with sound off as alot of the time they are subtitled) but I try to do this away from annoying people so in the bath or I'll go to the bedroom to sit for 10 mins so I'm not disturbing anyone watching tv etc.
Now I'm not saying I expect my DP to leave the room when he wants to watch a video but the other night we are midway through watching a drama on TV that is confusing so needs full attention, my DP isn't always as into these programs as I am which is fair enough so he sits on his phone but when he comes across a video he plays it and its loud enough that I can't hear the tv properly (not exaggerating) and this is not a one off he does it all the blooming time even if we are watching something he put on.
I know there are bigger issues in the world but am I being unreasonable to find this utterly irritating??