Here are some YouTube channels that might be interesting to you:
https://www.youtube.com/@HuygensOptics -- if you want to learn about optics
https://www.youtube.com/@EEVblog -- an opinionated Australian with one of the oldest EE focused channels
https://www.youtube.com/@CuriousMarc -- deep technical/repair videos
https://www.youtube.com/@ThinkingandTinkering -- alas, Robert Murray-Smith is no longer with us, he had many interesting things to say
https://www.youtube.com/@ThisOldTony -- Machining videos with a sense of humor
https://www.youtube.com/@smartereveryday -- an engineer who used to field test missiles learns new things all the time
https://www.youtube.com/@Blondihacks -- Canadian machinist who teaches along the way doing projects
https://www.youtube.com/@TheAmpHour -- an audio blog about electronics design
https://www.youtube.com/@Computerphile -- various topics related to computers with staff mostly from the University of Nottingham
https://www.youtube.com/@primitivetechnology9550 -- John Plant teaches by showing, how to build the most basic technology ever, he started with a rock and a stick, and worked his way up from there. Turn on subtitles, he doesn't talk, he annotates on screen, it's wonderfully quiet
https://www.youtube.com/@OCPTAP -- if you're a time nut, this is the channel for you, it's about very, very precise timing
https://www.youtube.com/@NileRed -- crazy and almost safe chemistry experiments
https://www.youtube.com/@urituchmanpigeon -- an eclectic approach to building things
https://www.youtube.com/@CaseyJones-Engineer -- an actual engineer who picks apart various things gone wrong with various current events.
https://www.youtube.com/@mrpete222 -- Mr Pete, retired shop teacher with an attitude, and a lot of things to show you how to do.
https://www.youtube.com/@PracticalEngineeringChannel -- Grady, another actual engineer, shows how infrastructure works, with practical demonstrations built in his garage, and some on-site things as well
https://www.youtube.com/@DavesGarage -- Dave Plummer, the guy who wrote task manager, and the zip file handler for Windows, talks about various things computer related
https://www.youtube.com/@AnastasiInTech -- A chip designer talks about the latest trends in chip fabrication
https://www.youtube.com/@JeffGeerling -- Things related to radio broadcasting, raspberry pi, mini-racks, gps timing, etc. His dad is a broadcast engineer.
https://www.youtube.com/@RealEngineering -- What it says on the time, breakdowns of how things actually work
https://www.youtube.com/@wgowshipping -- Sal Mercogliano, an actual mariner and Professor, discusses current events in shipping on the high seas.
https://www.youtube.com/@MentourNow -- A pilot discusses current aviation events
https://www.youtube.com/@NDC -- NDC Conferences - Interesting programming talks
https://www.youtube.com/@ZackFreedman -- Wild and crazy, the inventor of GridFinity
https://www.youtube.com/@voiceofthunder9620 -- An actual scientist, a chemist, who really, really despises Elon Musk, and sometimes plays with NaK, a liquid metal at room temperature. He might be the one who gives us a work-around for global warming
https://www.youtube.com/@NoEngineerHere -- Interesting projects, but NOT an engineer
https://www.youtube.com/@StefanGotteswinter -- a proper German doing machining projects
https://www.youtube.com/@dgelbart - Dan invented the first practical stepper, which gets used in the manufacturing of every chip ever. You really should watch his "how to make things" tutorial
https://www.youtube.com/@3blue1brown -- Grant Sanderson talks about Math, beautifully illustrated and story-told
https://www.youtube.com/@Kathy_Loves_Physics -- The real history of how physics got to where it is
https://www.youtube.com/@oxtoolco -- Recently retired from Berkeley's University machine shop, lots of practical tips related to machining very precisely
https://www.youtube.com/@TITANSofCNC -- CNC manufacturing, they offer free education in the trade
https://www.youtube.com/@Clough42 -- Machining and CNC related projects
https://www.youtube.com/@arduinoversusevil2025 -- Arduino vs Evil, an opinionated Canadian who swears a bit does various things related to machining, with a lot of tear downs of tools.
https://www.youtube.com/@WardCarroll -- Former Navy Aviator talks about current events, sometimes with Sal from What's up with Shipping (see above)
https://www.youtube.com/@tested -- Adam Savage, of Mythbusters does various builds
https://www.youtube.com/@w2aew -- Radio theory and projects
https://www.youtube.com/@AppliedScience -- Some of the coolest science projects, including things like spin coating, supercritical CO2, etc.
https://www.youtube.com/@RexKrueger -- Traditional Woodworking
https://www.youtube.com/@DylanBeattie -- Dylan is great at breaking down things that you think are simple... like "Plain Text" formatting
https://www.youtube.com/@ShakeTheFuture -- Melting metal in a microwave, so you can do home casting
https://www.youtube.com/@joepie221 -- A machinist in Austin Texas, with a lot to teach
https://www.youtube.com/@KevlinHenney -- Talks about programming
https://www.youtube.com/@GOTO- -- GOTO Conferences, programming talks
https://www.youtube.com/@essentialcraftsman -- Practical construction and blacksmithing
