good flow in the clip with the guy running across the room. but, you made a lulzy mistake which pretty much raped spacial logic. Classic mistake to make when you don't plan the scene out, or at least replay and check the previous frames you drew rofl. I'll let you/other people notice it.
Props to you for taking on faces, though. Look thick. Solid. Tight.
To tell you the truth I thought the face animations were gonna suck horribly >_<
Anyway you're alright at animating faces. And you're alright at drawing them. But if that's not enough for you, then look up things about how to draw the (real) human head, and practice.