What you didn’t say is what screen resolution you are running.
Too high a resolution and the videos will either studder,lag or cause and error.
I know because my old XP machine did the same thing when I went higher that 1024 x 768 resolution.
And I had 2 gig of ram at the time.
Still lagged.
I did go 1080 had for 2ne1’s new video “Come Back Home” though, I almost never care about the resolution
My resolution is 800 by 600 pixels. I like large letters.