My all time favourite is I Like To Make Stuff https://www.youtube.com/channel/UC6x7GwJxuoABSosgVXDYtTw - All things DIY, usually more focused on woodworking but with a nice touch of electronics, Arduino, etc. You can definitely feel his background on software engineering.
My lazy pleasure lately has been watching StarCraft 2 casts on LowkoTV. He is a knowledgeable caster with a great sense of humor.
I used to play StarCraft 1 when I was younger. I would never have the time to become good at sc2 today, but I've found the casts to be a fun, relaxing throwback. The top players are phenomenal and it is pretty incredible to watch them play.
There are a couple in this list that I'm not super proud of but I believe in honesty: Yogscast, Hat Films, Achievement Hunter, Kirsten Dirksten, Screen Junkies, Bangkok 112, Lazy Game Reviews, The 8-Bit Guy, the Russian/European hydraulic press guy, the Indian engineer who fake electrocutes himself all the time (can't remember name), The Slow-Mo Guys, ThePrimeThanatos, Mikey Chen.
h3h3Productions became famous by exposing stupid trends on YouTube (e.g. social experiments) but they also cover current events sometimes: https://www.youtube.com/user/h3h3Productions
I like historia civilis, a history channel that goes really in depth about famous battles and roman society. Three Brown One Blue is a great math channel.
a gaming stream edit dump where the vast majority of videos are of mario maker
the creator, carlsagan42, is a molecular biologist, post doc, working on ways to develop vaccines using plants.. a topic, among others, discussed on stream
the videos are edits of a once a week ~3-5 hour live stream
the community surrounding mario maker is really great with a ubiquitous quality of laughing off failure and mounting obstacle to overcome that resonates with me
one way carlsagan42 is noteworthy is in the way each level is approached experimentally while vocalising the inner monologue describing what is being done and why
i have spoken about one element of what is great about mario maker on this forum in the past(o)(i).. mainly parallels to algorithms
but there is so much more to appreciate beyond the game engine itself and the level makers' manipulations thereof
different level makers have different personalities that come through in their level design and it is fascinating how often and consistently makers develop new creative ways to utilise the finite tools of the mario maker engine
whether it be: the tightly complex one screen puzzles of seanhip2, or the trolling exploration of jon, or the glitch induced brilliance of psycrow, or the expansive puzzles of pinkbirdo, or any of the awe inducing creativity and 'kaizo' madness of the entire community, or even the surprises and 'hot garbage' of 'super expert'; culture emits
i'd recommend searching for the carlsagan42 videos with the makers and 'keywords' mentioned above because the playlists are often incomplete or simply too broad of categories to address the makers individually
that said the playlists can be an easy place to start and determine if the community is something you want to explore further:
Smarter Every Day - https://www.youtube.com/channel/UC6107grRI4m0o2-emgoDnAA
Tested - https://www.youtube.com/channel/UCiDJtJKMICpb9B1qf7qjEOA
Clickspring - https://www.youtube.com/channel/UCworsKCR-Sx6R6-BnIjS2MA
NYC CNC - https://www.youtube.com/channel/UCe0IyK4ntgdPTTjsxjvyHPg
This Old Tony - https://www.youtube.com/channel/UC5NO8MgTQKHAWXp6z8Xl7yQ
Colin Furze - https://www.youtube.com/channel/UCp68_FLety0O-n9QU6phsgw
HAWP - https://www.youtube.com/channel/UCrQieQckb9Fw9-SD7BdkpjQ