I dont want to sound off mean, but I'm going to give some constructive criticism on your animation.
First, the 2D part, it needs more in-betweens, so draw more frames so you can smooth out the animation.
The 3D part, the models do looked unfinished. Notice those lines that form your geometic shapes? It looks like you only took snapshots from your 3D software and didn't render them properly.
The camera could use more consistency. For example of those two guys on the couch when they keep switching lines, the camera abruptly switches position.
There's barely any animation for the models (lips dont count). Their bodies could use in-betweening like your 2D.
TL;DR -- This video is more of an animatic, not an animation; a slideshow of images rather than any character animation involved.
I'll at least give 1 star for effort.