"Banker's Song - We Didn't See It Coming" was originally done for an NPR podcast, of all things. It doesn't help that the backing track is the same one used in #13, which in turn uses the same backing track from Weezer's memories.
Call Back: The line, "Very Thin Ice," started in #2 and came back in #3 and #8.
Exhort The Disc Jockey Song: Subverted in "DJ Play My Song (No Leave Me Alone)," where the DJ keeps trying to explain that he doesn't take requests and that he can't turn up the music any louder without violating noise ordinances.
Angry Gorilla:Our logic and reason have proved you wrong! Bølverk: Go back to Douchebagistan, where you belong. Angry Gorilla: Don't make me have to start World War III. Bølverk: Bring it on; THESE GUNS ARE WMD!
Lyrical Dissonance: "Always Summertime", a song with a very cheery melody, but which is about about how depressed the singer is about how her relationship with her significant other went sour and she finds herself living in the past. Lampshaded in the video description where the song is described as "Cheerful-sounding".
Manipulative Editing: Both played straight and lampshaded with the Eric Massa interview, where they make it look like he admitted to groping a male staffer (and then right after start repeating that "You can take anything out of context.")
Memetic Mutation: invoked The "Bed Intruder" song has been covered in the genres of Metal (both Shred/Speed and Death varieties are represented), Acoustic, Marching Band, and Chiptunes, among others. Doesn't hurt that the original video for it featured a piano cover.
There are dozens of videos setting "Winning" to just about every form of media on the planet.
Invoked with Junkie Einstein's presidential debate song. Go ahead, just guess what he said.
Mundane Made Awesome: In Auto-Tune Verse, all addresses made to Congress must be submitted in the form of a song, all debate must follow a similar structure to a rap battle, the congressional choir must be present at all times, and the congressional drummer sets the agenda for every session.
Wealthy Ever After: Mitt Romney's attitude towards losing the election against Barack Obama. (Technically, he's still rich, but you get the idea; who'd want to take such a massive pay cut to become the President, anyway?)