Here are some channels I personally recommend to explore more about guitar playing and related topics.

Andertons Music Co
This channel is dedicated to guitars, effects pedals and amps. Showcasing all of the best gear as well as legendary guest players like John Petrucci, Paul Gilbert and Eric Gales.
Guitar / Tutorials / Comedy
Scott’s Bass Lessons
Free online bass lessons in HD, covering bass scales, bass arpeggios and soloing. For beginner, intermediate and advanced bass players.
Peter Luha
Tutorials that focus on guitar techniques and their use in practice.
This channel contains all of [Carl’s] theory and technique lessons. Most of these lessons include TAB.