It's never been easier to get training in all sorts of things, for free. For example, I'm currently taking MIT's 6.002 electronics course because I never learned circuit analysis properly. It's on youtube, it's free, I watch it anytime. There's the Khan Academy, too.
Yeah, but there's no certificate. And, despite what everyone wants to believe, most employers still want that certificate or degree. They're not gonna accept "I watched a bunch of videos on YouTube" as an alternative.
Expecting your education to make something of you, instead of making something of your education (track record) is another.
Managing to get a certificate does not guarantee one can apply those YouTube videos.