Ryan Connolly's Film Riot: This vlog was created by indie filmmaker Ryan Connolly precisely to teach amateurs and semi-pros how to build their skills from the ground up. Covering everything from camera reviews, to practical shooting advice and post production, it's a goldmine. What I love most about his approach is the 'trial and error' process. Connolly and his gang don't just preach at you, they try out their ideas in actual films and share the results. Connolly's enthusiasm is hard to resist, and the channel's exhaustive content is amazing.
Vashi Visuals: Hollywood film editor Vashi Nedomansky (Sharknado, Deadpool) has created a fantastic resource for editors. Focused on his Adobe workflow, he clarifies what larger projects can be like and even includes great tools such as the Premiere Pro project template he used to edit Deadpool. Nedomansky is so useful, he even includes a 'freebies' section on his website sharing exactly the kind of free downloads you might need. He is very dedicated to sharing tips and insights, and remains open in terms of showing his workflow to others.
Roger Deakins' Blog: Deakins needs no introduction. His blog adopts quite a different format to Bloom or Connolly's in the sense that it is a forum, with members asking questions about certain aspects of cinematography, in the context of shooting and production. What is great about this informal style is that you get real, practical advice from someone who has worked on some of the world's greatest movies. His writing style is frank, to the point and humble.