Youtube plays fine on my N810, if it is choppy for some people, they likely have a slow wifi connection or are watching a poor quality video. If you are on a slow connection, just let the video load fully, then view it.

I have also played mpg movies stored on a windows home server from a shared folder over wifi just fine.

For typing, its either stylus, or the thumb keyboard, the auto-complete words speed it up a lot. Some people use a bluetooth keyboard.

This post was written from my N810, with stylus.