I've searched the internet and can't find a fix. I have an apple tv (3rd generation) that's connected to my television and to my router (20Mbps). When I play a video from an iphone or an ipad that's connected to the tv through airplay, there are no problems. However, I've tried 3 different macbook airs (the newest one from 2013 running El Capitan) and they all have the same issue: the video is choppy. If display is mirrored, then the video on the laptop plays fine, and the sound is fine, but the video showing on TV is choppy/lags. If it's not mirrored, then the video on the TV lags. And it doesn't matter whether the video's being streamed from an online source (Youtube) or being played from a local fine. Any help would be appreciated. Thanks. --- Post Merged, Jan 11, 2016 --- K, I searched some more and some people said to download beamer and use that to play a video. And indeed, that made the problem go away! But Beamer costs $25 or something to purchase, otherwise it will only show the first 15 mins of a video.