Off grid crock pot

I love the idea of cooking low and slow, but being off grid means I don’t have the electricity to spare to run an electric crock pot, nor do I want to cook on my propane stove for hours and hours even on a low flame, I do use a pressure cooker to make things such as soup, stew and the such.

Today I ran across this video showing how you can use tea lights (small candles) to create an off grid crock pot or slow cooker. I was intrigued and watched, I can see how it can be a really good thing, I can also see where some improvements can be made to make it safer, I would use metal to line where the candles touch the base, that way there would be little chance of the wood there getting hot enough to combust and if the candle wax were to escape, it would be less likely to catch anything on fire. I would perhaps want to line the entire thing with metal to keep things safer.

He said the meal took about 2 hours to cook, different tea lights last different amounts of time, from 2 hours up to 4 hours, you would have to check it as time went by to know if you would need to add fresh tea lights.

Watch and let me know what you think?
https://youtu.be/3aVKYFT14Ro