It turns out that the issue I spoke about in my last video where transparent PNG's dropped onto a timeline without any kind of background looks "wrong", the Leader of the Shotcut Team answered my question on their forums very quickly and clearly. Here's what he had to say...
Watch video [SOLVED] SHOTCUT & PNG MAAAADNESS! online without registration, duration hours minute second in high quality. This video was added by user Drunk Linux User 16 November 2022, don't forget to share it with your friends and acquaintances, it has been viewed on our site 3 once and liked it people.