Well she was though. They could have added many moments not sure why people act like they hated her 24/7 for 7 years. She lived with Dianna, Naya said they were friends and she said she would work with her again. Not to mention her relationship with Cory. Was she horrible at times yes but that does not mean they also didn't have good times with her too.
I mean I wouldn't say that there wasn't any of her in the video. I saw a couple. Of course, that is done because of how the person made the video. They didn't show a lot of Darren Criss or Chord Overstreet as well.
