Apollo's Law- if it needs Clan tech to make it useable, It doesn't deserve those resources in the first place.
Sure it isn't the most practical 'mech ever designed, but it's a hundred ton axe-murderer. If loving that is wrong I don't wanna be right.
Here is the show's site: https://www.sciencechannel.com/tv-shows/how-its-made/ It's there under s20e1, like grimlock1 mentioned. You have to log in with your cable provider in order to view the episodes.
For something more directly related to Battletech you can see how IWM makes them for us!https://www.youtube.com/watch?v=sYopUa34hL4