If the problem persists, my suggestion is to close out your other applications (programs, web pages, etc.). If the vid still runs unevenly use Task Manager (assuming you're running Windows) to check the processes running in the background.
"It takes a lot of devotion and work, or maybe I should say play, because if you love it, that's what it amounts to. I haven't found any shortcuts, and I've been looking for a long time."
-- Chet Atkins
-- Chet Atkins