Fix malformed Playback Reporting database entries

[nathangur]

Original issue: #69

The most recent update to this plugin fixed some entries for playback exceeding 24 hours, but the incorrect entries still remain.

I have tried editing them by both automatically setting the length of the playback time to the length of the file (which didn't work since some of the playback file id's were also malformed) and manually (which isn't ideal for over 300 incorrect records).

Is there a way to fix these entries without just deleting them?