Hello,
First off I'd like to say welcome to the world of bladesmithing. Secondly, I would definitely recommend making your anvil more solid. As it is in the video you will probably have a lot of bouncing when trying to forge, which will result in much less control and stability, which could lead to you ruining your knife from some accident caused by unwanted movement, or having it spring over the fence. I would suggest a tree stump or other large and heavy block of wood, to which you will mount your steel plate tightly. Next, a grinding wheel isn't really very suited for removing the files teeth, as it is very hard to maintain a flat surface, without ridges. You would be better off using a belt sander as this will provide a constant, flat surface.one more thing I would do is make sure the pliers or tongs you are using have a lot of contact with the metal. Good tongs make for a great hobby and bad tongs lead to a premature death, due to stress.