I am in total agreement that a 2.1 system can be well suited for audio and video.
My systems that provided for both were based on 2-way stand mount speakers placed for best music reproduction, well off front wall with TV centered in between on front wall. TV can be covered when not in use. When using subwoofer often had it off for music. Don't use one now.
Multi channel audio for video can be great however requires a dedicated video room for proper setup IMO.