Basically Restart TV/Catch-up TV is where you can click any event in the past 7 days from the EPG viewer and start watching that event. This includes the current event. Events available for Restart are normally flagged in the EPG viewer with a special icon.
The recordings would need to be hidden from the normal Videos section of LMCE. They would also need to be available from the EPG viewer in mythtv/vdr which could be a big change.
What I might do is write something which schedules VDR to record channels constantly and then have these given a special tag so you can sort them easily from your normal recordings, but this is not a very polished solution.
It would also be great to be able to select one of the events available for Restart and "record" that event to your normal recording storage.
Has anyone else thought about this?