A Bunch of Pages that helped me learn different things, check them out!
Unity 3D Tutorials: The official tutorials for unity give an easy introduction to the Game engine!
I recommend the Roll-a-ball Tutorial to gamedev newbies, and the space shooter and survival shooter tutorials to Unity newbies!
Unreal Engine 4 for Unity Devs: A great video series (75mins) introducing Unreal Engine 4 to Unity Users!
Unreal Blueprint Multiplayer Networking: A very elaborate video tutorial series (8hrs) on creating a multiplayer game with matchmaking through Steam or LAN. The series starts from scratch, and includes creating menu widgets.
Unreal Networking – Replication: A video tutorial series (2hrs) introducing Replication, and how it works in Unreal.