Technology Connections: https://www.youtube.com/channel/UCy0tKL1T7wFoYcxCe0xjN6Q
Verge Science: https://www.youtube.com/channel/UCtxJFU9DgUhfr2J2bveCHkQ
Mathologer: https://www.youtube.com/channel/UC1_uAIS3r8Vu6JjXWvastJg
Sebastian Lague: https://www.youtube.com/channel/UCmtyQOKKmrMVaKuRXz02jbQ
Captain Disillusion: https://www.youtube.com/channel/UCEOXxzW2vU0P-0THehuIIeg
Stuff Made Here: https://www.youtube.com/channel/UCj1VqrHhDte54oLgPG4xpuQ
Just a few, there's definitely a lot more like CGPGrey, a bunch of PBS channels, 3Blue1Brown, Veritasium (the production quality on his recent videos!), Mark Rober, Tom Scott, Johnny Harris, Legal Eagle, etc
Also, not really HN content but if you like cooking, check out Adam Ragusea and Ethan Chlebowski, much better than the more popular cooking channels imo.