I will say, I frame based on the subject & purpose of the video. Leaving aside platform requirements (TikTok’s vertical-only format), I don’t mind shooting vertical if it’s a 1-person eye-level video, especially if I need to get their whole figure in the shot. More than 1 person and it’s horizontal.
What I seethe with rage at are the idiots who shoot historical events (tsunamis, daring rescues, sporting events or any fast action) vertically and then firehouse the camera back & forth trying to capture the action. Those people should be smacked and their phones taken away.