I've done some searching on the Google-machine and it looks like I am not the only one having problems with my videos hitching and stuttering after my computer. My mouse was stuttering too, after the upgrade, but I moved it to a different USB port and haven't had the problem.
But I think I have it at least narrowed down. Windows has a decent design, but it has an Achilles' heel. Only a kernel mode driver can block hardware like a mouse. It looks to me like some common driver is having issues after the upgrade. My guess is something to do with USB, but that's just a guess.
Either way, it's annoying. I like Windows 10 overall, but every time technology advances, it seems like we take a step backwards, too.
Someday there will be a stealth update where the problem will just go away. Maybe they'll make some oblique reference to the problem. Hopefully it's soon, because a $50 phone these days can watch video without hitching.