I think learning from vids is pretty effective. Everything I've learned has almost purely been from watching vids. How well has it done me? well, you can check the vids on my profile and judge for yourself. The tradeoff between learning from vids and learning from a teacher is time investment. Working out something your watching on a vid can be difficult and take more time to understand and master than if someone is physically showing you the move. On the upside, there is more of a chance you will stumble into something new and unique while trying to work out a move.

As far as the investment, unless you're spinning for an audience, or specifically spinning fire, then you really don't have to invest much at all. Twirling styled staff can be accomplished with a broom handle that you can pull off an old broom, or any straight stick. Cost = free (or very close to it). If you want to spin fire, then you can go as basic as investing in some aramid fiber (kevlar) wicking, some aluminum tape, a dowel (or broom handle or other sturdy wood stick) and some screws. Potentially under $20 for a usable fire staff.

You can msg me if you have any questions on staff building or need some reference links.

As far as vid resources, the previous links are great and I've got more in my profile. You can also check out my youtube playlist compilations:
www.youtube.com/profile_play_list

There should be more than plenty enough info to get you well on your way for very little cost.

Peace,
- Sui

here... for the lazy asses

video.google.com/videosearch