There was another website which let you find movie quotes. You search for quote and it brought up small clip where characters are saying that thing you searched for. Had very similar UI, can't find it.
Edit: probably https://clip.cafe/ there are few others too
There is another one which is like a Netflix of subplots extracted from movies. I remember it had lots from Rick and Morty. Because Rick and morty keeps bringing up random subplots never to discuss ever again.
There is another website which is a gif database of awesome shots from movies etc. It's like a reference database of camera work.
getyarn.io is the clip site I've seen. https://nestflix.fun/ is for movies within movies, not sure if that's what you're referring to by subplots thought.
There is another one which is like a Netflix of subplots extracted from movies. I remember it had lots from Rick and Morty. Because Rick and morty keeps bringing up random subplots never to discuss ever again.
There is another website which is a gif database of awesome shots from movies etc. It's like a reference database of camera work.
Will list when I find these urls.