Which kinds are you using? Plebs is using a mix of the "official" kinds of NIP-71 and also the forked version by Rabble, as described below:
Kind 21: Legacy horizontal videos
Kind 22: Legacy vertical videos (shorts)
Kind 34235: Addressable horizontal videos
Kind 34236: Addressable vertical videos (shorts)
So, even though you may make it responsive, you will also want to determine if you want to only show the horizontal videos or only vertical videos, or if both, ensure the media player doesn't crop the kind 21/34235 videos.
If you're wanting to maintain the vertical/portrait aesthetic like the rest of the videos on shosho, I would say filter the REQs so they are only gonna show 22/34236 kinds in the Clips section 👍
