I find the guy a bit difficult to listen to but the video is still worthwhile. Seems the DNC is experiencing the same thing that the Tea Party delivered to GOPe. And kept delivering until they had their president. The Democrat's Bernie Sanders base is fed up with antique Democrat party and wants socialism right now! So, a small group is fronting candidates like AOC. Cortez is not so daft as she sounds but she is raw and presently her positions do not belong to her. She is coached. On everything. But soon enough all the talking points drilled into her will be internalized and she'll be more or less on her own. The group that is backing her intends to back hundreds more like her.
If you choose to watch, when you get to the part where AOC is talking, just skip though it, you won't miss anything and you'll be a lot less annoyed.