This especially applies to what is now called "Vote" (I much preferred Moderation). I've been doing some Moderation - sorry - Voting today and more than once accidentally clicked on Approve when I thought it was just a single image, then the video progress bar showed briefly just before the page reloaded with the next image.
Also, I preferred A and L rather than A and R, as A and L are at opposite ends of the keyboard. L is easier to find than R. Left finger A, right finger L. Never mind. Probably just me.
There's NO video progress bar or other evidence that it's a video unless I pass my mouse over the image - which I don't always. So I'm approving still images which are actually videos, but I don't know that.
Also, I preferred A and L rather than A and R, as A and L are at opposite ends of the keyboard. L is easier to find than R. Left finger A, right finger L. Never mind. Probably just me.