I imported your mega links and will check this production later.
I'm not sure what the fuzz about the size is because I haven't checked it yet but for 30-40 minutes at 1080p, 7.5GB is indeed a little too big for distribution. If so, what follows could be of help to you.
Quoting myself:
doremi wrote: ↑Tue Jun 11, 2019 5:14 pm the generated output of your video editor may be bloated, too big for not any significant benefit. One thing you can do is use HANDBRAKE with the RF18 Constant Quality option, all other options by default. You'd be surprised how smaller the video becomes, without any impact to the quality.
LINKS:
HandBrake, The open source video transcoder
https://handbrake.fr/
For future reference, here's the original Hanbrake post by Eriol:
viewtopic.php?f=25&t=12815&hilit=Handbrake#p164242
Interesting for further details about the process.