I'm sorry if this is not the best place for this, I couldn't think of anywhere better to ask about it
the reason most of these people are youtubers is because I went through my youtube subscriptions for ideas
edit: I've just realized I forgot to add rule to the title but I don't know how to fit it in there with it looking not bad
Gamers Nexus is good for PC stuff, they do factory tours of PC parts manufacturing and testing/analysis of PC parts
Louslis Rossmann has great mackbook repair videos and now does lots of advocy for right to repair
Strange Parts does all sorts of electronics stuff and has been doing pretty cook factory tours too
Project Farm tests everything and does a great job of it