I'm not sure what the call the first one. Vocal splicey PMV? YTPMVwithmorePMV? You got me! It's pretty neat though.
And the other two are typography style! Get them all below.
1.) [PMV] My Little Changeling
2.) [PMV] Pinkie Pie - FUN (typography, motion graphics)
3.) LAUGHTER - Kinetic Typography animation