JayzTwoCents is a channel I found this summer and it's risen really high on my list of favorite channels. Jay is real, he makes mistakes and isn't afraid to admit when he's wrong or that he's made a mistake. He definitely has skills and knowledge and often shares this with his viewers. He does a lot of PC builds for different people or for different budgets and needs. He also does a lot of hardware testing, giving viewers the information they need to make an informed purchase. I really recommend checking this channel out. I've embedded one of his videos about upgrading a 10 year old PC. You can do so surprisingly cheap. Anyway check the channel out at: https://www.youtube.com/channel/UCkWQ0gDrqOCarmUKmppD7GQ
Linus Tech Tips (https://www.youtube.com/channel/UCXuqSBlHAE6Xw-yeJA0Tunw) and Techquickie (https://www.youtube.com/channel/UC0vBXGSyV14uvJ4hECDOl0Q) are basically a two in one. Both are good channels for learning about technology in general, not just PC tech, but you will find plenty of information regarding PC tech. Many of the videos are very short, but informative. Many of them are also related, which, if your an enthusiast, means there's plenty to see. I recommend these channels for all interested in technology, but especially for those that are new and wanting to learn more about it.