Thank you Borate.
I'm a little out of my depth here.
My camera offers video recording format: MPEG-4 AVC/H.264. / I import .Mov and export as .Mov
The dimensions of both clips are 1920x1080 24fps / Both 21secs long and no visual effects.
I have read this from NCH website
• Auto Detect - This is the default setting. If the majority of your video does not need to be re-encoded, it will automatically be exported with the lossless setting. If the majority of your video needs to be re-encoded, lossless export will not be used.
• Use Lossless Export - When this setting is selected, if your video meets the criteria for lossless editing below, lossless export will be used. Only portions of the video that need to be re-encoded will be re-encoded, the remainder will use lossless export.
• Off (Re-encode Video) - When this setting is selected, your entire video file will be re-encoded. Lossless export will not be used.
My version does not offer these options.
Is there any further help you can provide please Borate? It seems my clips do meet the requirements you outlined as far as I can make out?
Thank you for your support and I hope I am understanding things properly.