I think you would really improve from better multi-tasking. There are many points in the video where you focus on 1 part of the map without it being necessary. Particularly the time you dedicate to structure building is very low. You can replace lost trees much faster if you squeeze your builder orders in between your army orders more efficiently.
Organize your tasks in your head. Try to remember all things you have to do rather than focus on 1.
Organize your tasks in your head. Try to remember all things you have to do rather than focus on 1.