That's funny. I know lots.
Not that I don't believe liberals aren't prone to the same thing, but you're making a lot of assumptions here on one side of the isle and none on the other when we're actually talking about a very human condition.
That video proves little (for one, editing might be selective, we don't know the students' actual political affiliations, and the policies mentioned here are so general you could put them to FDR and they'd still decry it) except that confirmation bias is a thing, but we knew that already.