While it's an interesting video analysis, and I'm the first to say how bad Maimed is, I don't necessarily think it's justified.
I don't think it's really fair to compare a stage performance with a movie performance. Angela was playing to the back of the house. Lucy had to pull it in for the big screen.
You have to see the movie as a vanity project. Lucy always wanted to be a musical comedy star and this was her last attempt to make that happen. Plus, prior to filming she had been in a ski accident and didn't have the flexibility she thought she had.
I also think that Lucy was drawn to the potential comedy of the piece, but didn't realize that some of what Roz Russell did was replaced by music.
Additionally, everyone always praises Angela's vocals. Of course her phrasing and characterization are always perfect, but her voice is more warble than singing. It's not as bad a sound as Lucy's, but Angela's sound isn't perfect.
Yes Angela pulled off a better Mame than Lucy did, but if you look at "Murder She Wrote" Angela can mug her way through a show with the best of them.
If anyone ever tells you that you put too much Parmesan cheese on your pasta, stop talking to them. You don't need that kind of negativity in your life.