I don't know about shakiness, but the choppy playback is becoming more of a widespread problem - in fact, I'd say the choppy playback is almost as bad as it used to be on my old computer that was barely puttering along on 512MB of RAM.
Now I have to refresh upwards of 10-11 times to get vids to load.Now, I have to refresh every video I try to watch, also upwards of 6-7 times to get them to load.