Nope. It does it with random videos every now and then, and with no obvious pattern. It’s not lasting for a set amount of time either, so it’s not like something’s running in the background and slowing it down for a while.

In the past I’ve shut down everything I can think of on the server to stop something from taking priority, but it still happens. On those occasions it’s happened for half an hour or more, but other times it might last for a few minutes, or just affect one episode.