Dems changed. They morphed into the party of political correctness in which a simple majority rules. They put forward the embodiment of that as their candidate in the last Presidential election. As soon as they have the opportunity, they'll go back to being what they've been before. It's not just what they do, it's who they are. UT's linked video is a fantasy piece of propaganda aimed at swinging independents. Why can't we all just get along? Well you can if you join them. They just happen to be Democrats; but, that's not important: they can change! Trust them! Why? Because if you don't, you're not politically correct!
Dems became what they are over generations. Barring a significant emotional event in their lives, it will take generations to get back to where they were. The Future Majority's timing, founded in 2018 (in time for mid-terms); also, their altruistic message reeks of the contemporary Democrats' modus operandi of the end justifies the means.