[gia_ferrari]

I use it indirectly via Tube Archivist to get vastly better search. I've mirrored most technical stuff I've seen, and I can do fine-grained text search over video descriptions, audio transcripts, and even comments. This happens live, in milliseconds, and vastly outperforms Google's own search (which is optimized on vibes). Very helpful when I want to quickly and directly jump to a part that mentions a keyword.

I also use it to archive videos of personal significance.

Finally, I sometimes use resource-constrained computers (say, in my shop). The native video players are much more responsive than the official website.