1) Videos disappear. Anything I think I might want to watch again in the future, I always download rather than bookmark. Not just YouTube but any video site (e.g. Reddit).
2) When Internet is flaky or doesn't exist. I've downloaded whole sets of tutorial videos for example to watch on a plane.
3) Stuff in 4K where my video player does a better job with hardware acceleration than my web browser does
I mean out of all the video I watch from the internet, 95% is streaming, but youtube-dl is for that other 5% that falls into the three categories above.
A recent example of videos disappearing is when Radio TV Hong Kong got a new, more pro-Beijing head. The “inflammatory” stuff first went down, followed by anything older than 1 year on YouTube as cover.
2) When Internet is flaky or doesn't exist. I've downloaded whole sets of tutorial videos for example to watch on a plane.
3) Stuff in 4K where my video player does a better job with hardware acceleration than my web browser does
I mean out of all the video I watch from the internet, 95% is streaming, but youtube-dl is for that other 5% that falls into the three categories above.