I have several excellent YT channels to recommend, in alphabetical order:

Accursed Farms - The source of the “Freeman’s mind” series, Ross also makes excellent videos about other games.

Alasdair Becket-King - ABK is a comedian who makes short but really funny videos.

Anders Enger Jensen - A Norwegian musician making awesome synth songs.

Barely Sociable - Interesting videos about odd topics, focuses on “dark” stuff, has a good voice.

Brick Experiment Channel - Remote controlled submarine made out of Lego and other Lego stuff, need I say more?

Calum - A guy from Scotland making amazing videos about stuff like: Rescue buoys from WWII, WV Beetles at the south pole, Flying homes of the past, Jerry Cans, Secret WWII Bunkers, and much more. This is awesome.

Code Bullet - Chaotic AI programing, very fun and cool to see.

DankPods - Started with iPod Repair videos, reviews random crappy MP3 players, has insane amplifier to blow up headphones, mostly talks about weird nuggets of technology. Well worth a look.

James Channel - Do you want a portable Super Nintendo, but are worried about not breaking it? DankPods oldmate will show you how to do it with some random components, duct tape and hot glue.

Jet Lag: The Game - A game show where the planet is the board, they have played connect 4 across the US, Raced around the world, played Tag across Europe, made New Zeeland into a board game, played CTF across Japan, and more, really good!

Mustard - Exellent transportation documentaries, with great CGI.

Paper Skies - Son of a Soviet air force pilot talking about how life and work in the Soviet air force was.

Paper Will - Documentaries about “dark” topics like “The ugly side of kids TV”, “Entertainment made by cults”, “Games about 9/11”, really interesting stuff!

Peter Dibble - Want to learn about the bus running on the wires of a ski lift system? You can here! You can also learn about that time that Amtrack brought a Swedish and a German high speed train across the US for tests in the 90s.

Ringway Manchester - Videos about two way radios, amateur radio and other things on the airwaves.

Side Note - North Korean cruises? Hitler’s Birthday? US presidential yachts? An ice block in Sahara? Mysterious Egypt/Israel flights? A floatibg hotel in North Koera? What do all of these topics have in common? They all have videos on the Side Note channel.