This site archives livetweet events, and plays them back in sync with the original video material. Rewind, pause, or fast-forward the video, and the displayed tweets stay in sync with the timeline. Relive your favourite livetweets, or catch up on ones you missed.
This is still in alpha; mostly it's a technical experiment! And it only supports YouTube right now.
Go to livetweeting.org for more live-tweeting info (unaffiliated)!
Videos and tweets are copyright their original authors. Website code copyright © 2016 bunnyhero labs.