There are some things on YouTube that are blocked and shouldn’t be. A channel called OverSimplified (a channel that makes animations and retells historical events with them) is an example of this.
As an 8th grader, currently, I had an iPad instead of a Chromebook last year. OverSimplified was not blocked on the iPads, and I liked to use it’s retellings as a study tool. Also, many music videos, AMVs, LMVs, PMVs, and other types of music videos are blocked, even if the most obvious message of them is a very positive one. An example of this is the LMV of You Will Be Found, from Dear Evan Hansen. Also, some translation websites like Spanishdict are blocked as well, which is incredibly inconvenient.
photo credit: theverge.com