First they both ran 6 hours and got up to 94% before failing.
Secondly, why do I get Two copies, after the video has finished it generates a second copy.
6 hours? Both these are less than an hour log and the 1080p captures (840mb) here in a few minutes.
Where is 0xc10100be coming from? Your player? If so that means your player doesnt support the format - in this case mkv for the one below. Use VLC that can play most formats or convert to something your player supports.
If you are still having issues then please provide debug logs as per https://www.jaksta.com/support/windows/technical/jaksta-media-recorder/how-to-generate-debug-logs-6000009063