As the title says (and sorry if someone has brought this up before; if so, I ask the mods to merge with the original thread). This channel focuses on the more rare and obscure firearms in history that show up in various auction houses with the presenter doing his best to show both the history behind why such guns were made and show how they work. Not all the guns shown are uber rare obscurities that only gun hipsters would appreciate, but I could see several members of this site *cough*Tam*cough* geeking out HARD over the guns brought to the screen. Just on the pistol side, Ian (the channel owner and main presenter) has shown the Webley 1907, Webley 1910, Mars Automatic Pistol, Walther MP/PP, Mauser 1912/14, Schouboe Prototype .45 ACP guns submitted to the trials that gave us the M1911, etc. And that is just on the pistol side.
This channel is both a fascinating look at classic weapons, weapons that never quite made it, and is an overall infinite time sink.