Never use Imgur for porn btw. They have as of this year nuked all forms of NSFW and went full sfw. Many, many, many pieces of art were lost thanks to this move
When literally 50% of the screen in your video is dedicated to feetshit and nothing else, then maybe you should just go ahead and skip to the part where you only release videos of feet and nothing else.
I'd argue that what Zmsfm does is fine? The animations aren't aggressively about feet or feet focused. They are just there in the frame. Nothing more, nothing less.