Google made a bunch of announcements at the Google I/O 2012 keynote on day one. Android 4.1 Jelly Bean. Google Glass Explorer Edition. The Nexus 7 tablet. The Nexus Q. That's not even the whole of it. We're sure you've read all about it, but nothing beats watching the introduction for yourself. Now you can, as Google has released the day 1 keynote on YouTube. Check it out after the break.