(1) Taking video with a mobile phone held in the vertical (portrait) position. This is a totally unnatural format for viewing any video - or photo for that matter. You get much more in the picture and it is easier on the eye when you use your phone in horizontal (Landscape) format.
(2) Leaving the TV or radio playing loudly in the background. So distracting! Nice music is OK, as long as it is not loud and distracting. But TV soap operas, radio DJ's and/or commercials? No way - we are making love FFS, or just having a good fuck. Don't spoil it for your viewers.
This is a starter post for this thread. Feel free to comment and post your own pet dislikes or video advice.