This is only a rough plan for future videos and it's in no particular order but feel free to ask for more information or suggest any tutorials you would like
OpenGL Maths
Translation
Rotation
Scaling
Texturing using SOIL
Normals
Orphographic vs Perspective projection
Frame rate
Wireframe
GLFW Prevent Resizing
Lighting
Skybox
Text
Particles
Collision
Raycasting
Anti-aliasing
Tesselation
Height maps
Custom water system
Model loader
Ping pong game tutorial in OpenGL/GLHelper
OpenGL Solar System with realistic/variable day cycle