These are “smart” channels that are mostly for entertainment but still teach you at least something:

• Stuff Made Here - fun engineering challenge videos
• Veritasium- math and physics explanations
• Mark Rober - kid friendly engineering challenges
• Technology Connections - everyday object explanations
• Steve Mould - science explanation of random concepts
• Outdoor Boys - outdoor survival
• Woodsbound Outdoors - outdoor survival
• Fireship - shorter, technology explanations
• Internet Shaquille - food and cooking explanations
• ElectroBOOM - comedic electrical engineering
• Company Man - light analysis of failed or successful companies
• Atrioc - comedic current events, marketing explanations

The outdoor survival ones are new to me, but for some reason I’m really into them.

Technology connections is good

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It would help if you said more specifically what you were looking for tutorials about, and also what your pre-existing knowledge level is about those topics. https://www.youtube.com/@richarde.borcherds7998 (Fields medalist Richard Borcherds) has lots of great math videos, but they are generally at mid-undergraduate level or higher, sometimes graduate level, so not for everyone. 3blue1brown is also good, and more elementary.

Otherwise, if I want to find out about a specific topic, I search for that topic as needed. Like I needed to fix a washing machine so I found a video about that particular repair. It’s not something I would have watched for random entertainment or education.

You sound like you’d like the types of videos posted to /c/mealtimevideos@lemmy.cafe

Also these types of creators are commonly on nebula.tv, if you want to support them directly.

Try this from technology connections

Practical Engineering is a great channel. Some of his videos are longer, but most are well under 30 minutes and if you have even a passing interest in civil engineering there’s a wealth of information there.

I don’t know what (newpipe) means, but I’m soon to start a channel explaining the rules of various tabletop RPGs in simple context, broken up into small videos.

It couldn’t hurt to have more voices in that realm. My local tabletop group plays D&D, but we’re thinking about switching to Star Trek Adventures.

Besides YouTube, try nebula.tv. It’s cheap and might be up your alley in particular.

NightHawkInLight is some nice DIY home experiments like traditional sparklers and homemade sapphires in a microwave.

Skibidi Toilet

DIY Perks
Stuff Made Here
Strange Parts
Styropyro

ElectroBoom

does things with a 3d pen no one would be stupid enough to do. He’ll spend hours making a shape that could be done in seconds on a printer and it’s extremely impressive.

Steve Mould (fun physics explainers)

Matt Parker (fun math explainers)

Linus Boman (fun visual design explainers)

I’ll add more if I can think of more