I watched the whole thing.
They overdo the sentimentality. It would have been more interesting to have more anecdotes and insight on the behind-the-scene creation and writing of the show. Instead it's mostly people crying at memories.
They also overplay the "revolutionary" aspect of the show. It was just a sitcom, and not the first to feature a Black family. Alfonso Ribeiro saying things like "what WE created" completely leaves out the all-important writers, who actually came out with all of those stories and jokes (and who were all White, so the "this is an accomplishment by Black people" angle rings false).
It was also a show that both Black people and White people enjoyed, which is missing in these sad, "woke" times, where you're supposed to only relate to characters who share the same skin color. They should have made that point.