I got that butane adapter on eBay.

I can get the "long" butane cans (the type of cans shown in the video) at the local Asian market four for four dollars ($1.00 each) vs. about $6.00 each for the same size (230g) specialized backpacking canister.

Just be aware that 100% n-butane is a poor fuel below about 5C, and a terrible fuel below 0C. For fair weather use, cheap n-butane burns every bit as well as expensive propane/isobutane mixes. In fact, it's kind of a waste to burn expensive propane/isobutane mixes in fair weather. Why not just burn cheap n-butane?

You can also buy refillers on eBay, but they're not cheap. I did buy one, and I now refill my standard threaded backpacking canisters with cheap n-butane which means I don't have to lug the adapter and a "long" butane can around.

HJ