In all reality, videos will not help that much. You can get a very basic base of knowledge but in all reality, they are about useless. Your best bet is to find a local range with a coach or find a friend that is proficient with archery gear to help you learn. A video can't see you misplacing an anchor point or not properly holding your bow arm or the many different other things that can make a shot less than desirable. Archery can be easy to learn, but it is still a very complex set of motions all formed into one fluid action. There are also many differences between Traditional style archery and compound.
I agree that having a good coach is the ideal option for striving to shoot better in archery. I have been shooting archery rather regularly for about a year now. I have received some good coaching and advice during that time. However, the bulk of my practice time is by myself. Consequently, I felt a quality instructional video might be a nice resource to mentally refresh optimal shooting techniques from time to time to try to ensure that I get the most out of my practice time.
Along the same lines of trying to maximize my solo practice time, I used my digital camera to record myself shooting. It was more difficult than I thought to spot problems since everything happens so quickly, but I was still able to spot two problems with my technique. Just trying to think of new ways to keep improving.
Others have offered up a sighting of roughly 2 inches high at 100 yards as a good sighting scheme. In my own experience I have come to favor a sighting of 3.5 inches high at 100 yards. This allows for the individual to hold dead-on (directly in the middle of the top and bottom) the animal out to roughly 350 yards.
Magnum calibers such as the 7mm Remington and 300 Winchester will extend this slightly. At 400 yards I hold directly on the backbone of the animal. The drop at this range allows the...