The video links are on the product page for the Skene dimmer. But yeah, guess they are not easy to find unless you scroll to the bottom of the page. http://ledrider.com/shop/?model_number=IQ-175 Depends on the lamp. If you have one lamp with a super tight beam, then adding a second one in a wide beam will help with coverage. I prefer lamps that give both range and decent width from a single unit. At the end of the day you wind up with the same spread and no separation between patterns. Again, depends on the lamp. The tighter the beam, the less close in tree top illumination you're going to get. Most of our lights (LD35, LR5 and LD5 for example) have a tight main pattern, so close in treetop illumination is minimal. But, they all have a conical pattern, so they will illuminate trees farther out. The upside to the conical pattern, is that it remains consistent while cornering, vs a light with a cut off. It's something you get used to though - and as I said a tighter pattern light will minimize the issue.