I use it quite often. Chills the eyes when reading. Standardized font(size) and design make this bearable.

lemmy also supports rss! your inbox can generate a rss feed. Also communities have feeds that update whenever someone posts on them. For example for c/technology sorted after active: https://lemmy.world/feeds/c/technology.xml?sort=Active

I guess to get actual value from these videos you will still need to visit youtube.com though, in the end giving them valuable data to analyze.