I'm noticing the slightest stutters with 32gb, quad core i7 and a gtx 780 on chrome. I'm assuming it's a connection thing.

Same when I watched the video links directly.

Downloaded the tree one (which is where I noticed it) and played it with VLC twenty times or so on loop; didn't pick up any stuttering then. Must be something with chrome or my network (for me)

Interesting, must be your connection! I've seen a few of these background movie sites, and they generally seem okay-ish on my decent connection.

Perfectly smooth playback on my 6 year old C2D/4GB RAM (Win8.1 x64)