Hi - please describe the feature that you are missing - that way, we won’t have to guess from a video.
That said, I’m guessing that you are looking to be able to scroll through the list of fonts and have it updated in the text box. That’s still possible in Rhino 6. Put the mouse pointer above the font and use the scroll wheel to scroll:
I thought it was clear with the video I’m sorry 
go that’s good thank you very much