I found these "low light quality" videos using the Samsung Ativ S, Lumia 820 and 920 on youtube. I would suggest looking at them in full screen in 720p HD to see all the details. I also linked the Nikon D600 to compare them to a standalone camera...hope this helps.
Samsung Ativ S[YT]http://www.youtube.com/watch?v=O-ra7m0_9NA?hd=1[/YT]
Nokia Lumia 820[YT]http://www.youtube.com/watch?v=NPKKyJfAX1s?hd=1[/YT]
Nokia Lumia 920[YT]http://www.youtube.com/watch?v=sERJZ5KJHz0?hd=1[/YT]
Nikon D600[YT]http://www.youtube.com/watch?v=oO6gQ37ZqjM?hd=1[/YT]
Samsung Ativ S
Nokia Lumia 820
Nokia Lumia 920
Nikon D600