Cons:
Need a lot of candles in a small space
Will get hot, making the small space hot and melting the candles faster
Fire hazard, even candles in jars, because of the amount of heat generated
Candles are expensive, charcoal and a chimney starter and/or portable barbecue are much more cost effective
Pros:
Candles will not cause the same amount of smoke and strong smell that would warn others if one is in an apartment
Overall:
Informative video, but seems unreliable as a method if one has a serious intent to ctb