You're On The Right Track..
PRB,
I just finished converting 339 Gb (GIG) down to 473 Mb. AVI clips (avg 2 minutes) going back to 2011. I still have 115 Gb to convert to WMV. Took me 2 days. Used AVS Video Converter. You can BATCH convert these individual avi video. You have to go 'Advanced' and tick 'Batch Mode'. Then you load 10 avi videos, and choose a name. I use year/month/day plus Sim. IE: '11June01 FSX'. Those 10 clips will be lumped together, so they should be 'related' (ie: same airplane).
Then you can inport that 'lumped' together WMV into Win's Movie Maker and edit out the parts you don't want. You can also work on sound (ie: increase loudness, mute, fade out, etc).
Then you can save as a 'Project' in case you want to add more footage later. Or just 'Save To Computer' as an WMV file, which you can then zip and upload to YouTube (which is what I do).
This company has very well written programs, which work as expected, yet have plenty of features. I paid $39 or so for the video converter and consider money well spent, as other programs did not work as well (especially the free ones). PM me and I can give you some tips, or answer some questions. Glad to help. I have been doing video (FRAPS / FSRecorder / Win Movie Maker) since 2007.
Chuck B
Napamule