We live in the age of YouTube. So why buy a DVD? Do a search for any aspect of reloading and you will find a video for it.
For instance, ammosmith on YouTube makes some good videos. Here's one I send to friends when they ask me about determining cartridge overall length.
YouTube - Making a Overall Length Guage
Also, agree with previous post that after watching some videos it would be good to sit down with someone that knows how to reload and watch so that you can ask questions as everyone has their preferences for tools and techniques for reloading.