You could start off by buying a used one to see what you like and don't like. Personally, it is much easier to look through the eyepieces than on a screen.
You will need a stereomicroscope (two eyepieces allowing you to see in 3D) but if you want to make videos, then consider a trinocular micrscope so that you can work and record at the same time.
Look at this video from Louis Rossmann regarding the tools he uses...
https://www.youtube.com/watch?v=bVoBZqlvCKo