YouTube Videos are playing properly on Qosimo laptop

Hello guys,
A month ago I bought a new Qosimo X770 BT5G23 laptop.
It is working properly, but the only problem is playing videos. When I am playing video on YouTube, Facebook which is linked to YouTube the screen is showing white color. I can hear the sound but no video. But the video is playing with white screen. But when I go full screen the video is playing properly. Flash Player is updated and all drivers are up-to-date.
I am unable to find the problem. Please someone help me to fix this issue. Thanks a lot and regards.
