Is there a maximum duration for a LIVE-to-VOD recording?

While there is no particular maximum duration for LIVE-to-VOD recordings of Live-Events, the official recommendation of Lightcast is to limit recorded events to 4 hours. The reason is simply that the chances of interruptions of your stream, or short glitches in the stream, increase with the duration exponentially. This can lead in small or large errors on the recorded files of course.

Keep in mind that the servers can only record what it receives and all errors, glitches, interruptions and everything on camera will be recorded. You can control the duration through the start and end times of your Live Event, and also trim the recorded files afterwards by setting in-points and out-points.