What program are you using to (attempt to) play the video? I'd recommend VLC Player. I'd say your issue is inadequate RAM, 2GB isn't enough with the resource hog that is W10 (and is barely enough with W7). Try running Windows Task Manager to see what is using your CPU and Memory to cause the stuttering video (and of course don't run any other programs while trying to play the video).
Another thing to consider is how large the media file is. When you get over 1gb in size, a puny processor like the Intel Atom N470 really labors.