The thing I like about this video isn't the production values (which are pretty high) or the cool combat (which is pretty cool) -- it's just the attention to detail, the sound effects, the fact that Agahnim fights and reacts like he does in A Link To The Past. I like that.
The video is called The Dark Mask. If the video gets over 1 million hits they team behind it plans to make another, following on from the cliff hanger at the end of this video. I would definitely watch that.