My view:
• I think you could have edited the shaky bits out.
• Don't run the trains so fast, as you did on the outer track. The inner track was more of the correct speed. Going too fast may shorten the life of the engine. Going at slower speeds also shows off your trains more, when operating..
• I know it's hard to keep a steady hand and operate a controller as well, but at the beginning and some other place, where the camera wasn't really focused on the subject.
But your video improves near the end.
Something tells me that your train set is going to grow & grow.
By the way, what was a diesel doing on the back of a freight train, and what was that round "think-a-mij" on one of the carriages?
EDIT: I have to agree with the comment on your channel - the lime hurts your eyes!