Trouble with Android M install on Google Nexus Player

I just loaded Android M onto my Google Nexus Player so I can watch L my HD Homerun cable more reliably. Now I am getting intermittent screen flashes rendering it basically unusable. Any ideas of what might be happening?

I'm a noob, so it won't let me post a link but, here's a copy/paste link to what's happening: youtu.be/3PJxuWAHdo8