Lip Sync Walkthrough
Chester Sampson has an in depth series of how he does a full dialogue acting piece:
• How I animate an acting shot Pt1/3 - Blocking
Sir Wade is an insane resource and I recommend absorbing as much from this channel as possible:
• IMPROVE Your Lip Sync Animation in 3 Steps
• The Secret Workflow for Animating Dialogue
This channel also has a wonderful breakdown of the process as well:
• How to Animate a Dialogue Shot Part 1 | 3D...
A little more advanced with the concept of Animation Layers, but still a really nice method:
• HOW TO ANIMATE LIPSYNC - 3D Animation Tuto...