Taylor Swift is a DUer...

[Sgent]

or someone on her production crew. Look at the spelling of the sign at 2:08 and a few more times in the video. I've only seen that spelling here and DailyKos -- it dates back to Cindy's Gold Star protest at the Bush Ranch.

?start=130

[MontanaMama]

1. Interesting. My jury is out but

wouldn't that be something? It’s little a little clue!

[LSparkle]

2. Good to hear! Knew she was a leftie ...

I always have to explain the “Get a brain morans” line when I use it around friends. Maybe I won’t have to do that so much anymore (ha).

[Renew Deal]

3. Taylor Swift is California Peggy.

That phrase is based on a real sign from around 2003. And it's not that hard to find.

[Harker]

10. Now you've done it.

[nocoincidences]

4. It's a meme, and not unique to DU or Kos.

Get A Brain Morans
Meme Status: confirmed
Origin: Photo of a Pro-War demonstrator in St. Charles, Missourii
Year: 2003
Type: Exploitable

https://knowyourmeme.com/memes/get-a-brain-morans

[GReedDiamond]

5. Get A Brain Morans...and more...

[zaj]

8. It's all over the web. Not a DU thing.

[GReedDiamond]

9. Yes...nt

[Salviati]

6. Hers isn't the first video to feature the Moran...

as noted in https://upload.democraticunderground.com/10025243611

(at about 1:10)

While it's no proof that they or their crews are DUers, I think it does suggest that some of them must hang out at some lefty boards where the meme propagated, not surprising, especially given the material for the video in the OP...

[NJCher]

7. Love this!

How clever. I could watch it again and again.