Dear Tukan42:
Thanks for your message and we're sorry for the inconvenience.
'While this worked very well with SD Videos'
Do you mean Smart Cutter worked on SD videos but failed on HD videos?
'The examples are large though - 5.6 GB at least.'
Do you mean Smart Cutter worked on small video files but failed on large video files?
Please feel free to send us your further advice and suggestion.
Thank you very much.
Best Regards,
FameRing Support Team