Taking a flameworking workshop will pay for itself. You will learn so much more in a workshop versus a video because it is so hands on. You will learn about the make up of glass, techniques, and overall knowledge gained from the instructor and watching others. On top of that there are huge safety issues to be concerned with and most basic video classes don't cover that.
Find a glass studio near you or spend the extra money to travel to a location to learn. After that learning via dvd's, videos, etc can be done, because you will practice more and more on that technique. Even if you learn or start on your own get into a workshop to gain more knowledge.
Flameworking is not like following instructions to make a bracelet. You don't learn the steps and you a can repeat making that same bracelet over and over. Flameworking takes practice, practice, and more practice. You can learn how to make a bracelet in one hour and look like a pro, but flameworking takes many hours, 50-100-250 hrs or more to get to levels that are good enough to sell or be like Larry Brickman, Margaret Zinser, Andrew Brown, Larry Scott, Harold Cooney and so many others.
Good luck! Glass is an awesome thing to work with.
Scott