Tim prefaces the video with the following:
This fly cannot be judged by how it looks in the vise or in the fly case at your local shop. It has to be seen underwater, imao that's where fish spent most of their time.
The following video illustrates some of the fly's many attributes like trapping air bubbles and translucency, but it falls short by not showing its most important feature– the wonderful shimmery look the antron sheath has underwater, in a real stream with natural sunlight. Gary believed (I know this from reading his book) and so do I, that the shimmer is what makes trout really take notice.
LaFontaine Sparkle Emerger Underwater from Tightline Productions on Vimeo.