On the AppEngine track, both of Brett's talks ("Building Scalable Complex Apps" and "Offline Processing") are worth watching [when the videos are posted.]

I attended the V8 internals talk out of curiosity; it was quite good, too.

And for no apparent reason, I just watched the Android real-time games talk. He has lots of insightful things to say about both the industry and the use of Java for games.

I don't understand why the video quality of these isn't higher. Who records in SD nowadays?

Some videos may have higher quality. Look for the HQ button on the video player.