It's probably pretty noisy as well, and needs to be fed with not just coal but also metal to fire up.

This is why I don't usually look on YT for ideas on what to make. That video in particular just shows pretty-looking things which may or may not actually do anything useful, all the while not showing the construction process, or how to acquire materials for them (probably spawned with console in this case). Not to judge, but the purpose of these type of videos seems to be to attract clicks and views and little else. Might be a fun thing to watch, but poor thing to learn anything from.

You'll learn more by doing things yourself, including failing at things, or finding a video channel or guide which does things your way instead of showing "10 cool things you can do" kinda content.