It sounds like from other reviewers that there is a delay between video and sound if you pair this with a video source, so you can't watch movies on it yet. Being that it's wifi capable and has a chromecast built in, you can cast your music to it meaning you get better sound and the notification sounds from your phone won't interrupt your music anymore. I haven't gotten to test the expansion, but JBL does claim this can be linked to other JBL Link speakers for a multi-room music system, ala Sonos. I hope this helps.