I tried it out, and the video quality is whatever the quality is of the file you are playing. However, another thing to note is using All Share does not transcode the video, so whatever video you choose, your device you're streaming to has to be able to play that format. On another note, I had no success with using All Share to stream media from my computer to my phone, and I had no success streaming media from phone to PS3. I have a Samsung HD TV, and I was able to stream to it's DLNA service, but the formats it supports isn't too great.