So peltier? Guess it's easier to make less inefficent than going with a steam engine or a stirling one, at that size... Also does the video ring some alarm be

So peltier? Guess it's easier to make less inefficent than going with a steam engine or a stirling one, at that size... Also does the video ring some alarm bells in anyone else or am I overreacting? edit: look like it : peltier with something like a boost converter behind it...