I haven't ever been able to get a smooth playback of films or online videos like Youtube on my Q550. All drivers are up to date.
What am I doing wrong?
I have even tried third party software like VLC Player then uninstalled it as it was the same jerky video taking ages to buffer and sync with sound. I know it's not my internet connection as I have fast broadband and other laptops are blazingly fast on it, and also the fact that I ran a few films from SD cards and USB drives, with the same result .