Only weeks? I wouldn't watch any video for even 10 seconds if it's only 360p. I would instantly start tracking down the problem and/or switch to a player that can do more.
0th world problem, to the extreme. The bug would be fixed before at least 99.99% of users noticed and tested an alternative.
Put yourself in Mozilla's shoes. Why would their users have to take the punishment for no apparent reason? Wouldn't you be protective towards your users/reputation?
It would be the week a lot of new computers were unboxed.
But none of them run XP.
True, I would expect a lot of XP computers got replaced that week.