Sequencer used a hack to get around YouTube's lack seeked event.

Instead what we did was paused, seeked, play, listen for play, when play, pause and we've seeked.

This is a hack, because while youtube doesn't fire a seeked event, it does wait for the seek to finish before playing, and does fire a played event.

Without this, if you seek into a media clip, you'll see a flash of the first frame. Only happens on a seek, and only when seeking into the clip. Doesn't happen on playing through the clip because it is already seeked.

The act of pausing, seeking, playing and pausing was too much for jwplayer. Removing this, and using a straight up seek means we're faster and more stable, but have a blip of the first frame. I'm thinking we can live with it.