Very weird bug in MacOS Sierra
Very weird bug in MacOS Sierra when trying to open specific folder shown in the video Untitled - Streamable
even clean install of the whole OS didn't help.
MacBook Pro with Retina display, macOS Sierra (10.12.6)
Appears to be something with the GPU or video, it also appears you have a litany of 3rd party stuff vying for real estate on your top menu bar.
You may post an EtreCheck report for futher analyis. The link is www.etrecheck.com