Edit recorded video/audio recorded on DVR

[#1]

Is there a way to edit a video recording to save a part of a recording and discard the rest?

Example:  Suppose that I recorded the entire Superbowl on my Verizon FIOS recorder but that I want to keep only its halftime show that was saved as part of the entire long Superbowl game.

Is there a way to edit to delete the first and last parts of the game to save only the half time show from the recording?

Please note: there are other recordings that I would like to edit in a similar way.

[#2]

You can’t edit a recording, but you can set a manual recording for specific times.