You’re right. My bad. Sorry for that. I was trying to fix an embedded video frame size.
My issue is that I embed a video but there are wide black margins on the either side of the video to fill what I think is the post’s page size. I try to change the video size settings (the pixels) from the post under admin mode but there is no change. The size of the video frame stays the same and the black margins on the side are still there.
The strange thing is that the video seems to be embedded well (with no margins on the sides) when I view the post in the ‘visual’ tab under in the admin mode (there are three tabs: visual, text, and cornerstone), however, when I view the actual post page the black margins on either side are still there.