nostube uses nevent for readonly videos 21, 22 and naddr for editable kind 34235/34236. I think it's necessary to have the author and relays encoded in the link, to be able to find the videos on custom relays. I was more worried about the part before it .. /video/ or /v/ or ...? 😂

I have to admit when I was about to clone&edit a video event, I had to guess the relay to fetch the raw event. My second guess (damus) was correct. Another note on having the ID in the URL: it refers to a 3xxxx replaceable kind, thus it's possible that the video event had been replaced (edited), and the old ID is not available anymore.