Shorts are videos, but videos are not shorts
When YouTube tries to suck you in to the Shorts, that is all they will display on your screen. They might hide the video description away in a menu (you know, the place where some creators like to hide the fact they might be sponsored). They might push you to take certain actions (swap the Subscribe button for the paid Join button).
So it might be good to know that every short is (also) a video. You can take any URL for a short and turn it into a video URL:
https://www.youtube.com/shorts/rBIVY40gKVc ⤷ https://www.youtube.com/watch?v=rBIVY40gKVc
Now sit back and enjoy the known YouTube UI. As a bonus this also gives access to YouTube’s video transcripts where available.
From my testing it does not seem the oposite is true. Every video is not a short. Trying to open a normal (long form) video on a /shorts/ path will automatically redirect to the full UI.