I have had this issue with Chrome and YouTube playing videos in a horrible resolution when i switch to fullscreen. My host OS screen resolution is 1920x1080. But flash player often goes down to 640x480 when i switch to fullscreen. When i test this in other browsers (Firefox, IE and Safari): It works all fine.
My specs are:
- CPU: Intel Core I7: 950 @ 3.07 GHz
- Graphics card: Nvidia GeForce GTX 570 (4048 MB video memory)
- RAM: 24 GB (Kingston - Don't remember exact model)
- Motherboard: Gigabyte X58A-UD3R
- OS: Windows 7 (Version 6.1 - Build 7601)
I run the latest version of Chrome and flash plugin. I have tried re-installing Chrome 2 times already with no luck. I also re-installed my Windows a few weeks ago. I had the same issue before i re-installed.
If there is any more information you need: Be sure to ask and ill provide it right away.