I was a little disappointed in the video quality of the shared video for both the Xbox One and the PS4.  They both work well enough, but I wish they used a higher bitrate for capturing.  As  comparison I used Avermedia’s Live Game Portable device to do a video comparison.  The Xbox One and PS4 video’s are going to be on the left, and the LGP will be on the right.

If you have a hard time seeing the difference with youtube, you may want to download the video with keepvid.com and look at it locally for a better comparison.