Split-screen closed-circuit sports recording
Your best bet to easily do this is probably to set up two cameras with half the field of view being used.  Then simply setup a simple project that can combine the two and encode it for electronic distribution.  If you want to do an all digital route, you are still going to need to run an encoding after the fact to get the size down, so doing the combination of two feeds as a fixed project in post is probably the most straight forward.  Should be able to just copy the files and hit go.