It just wouldn't leave me alone, so I put more effort into making "Rufus and the Diving Board" sound for all sizes. It was a really confusing task and after many attempts I managed to create video files in much smaller file sizes. So I was wrong about Shotcut, it works, even with tiny bugs. A big help was the converter.app, without their help this wouldn't have been possible. The 8k version is now only 4.5 MB instead of more than 20 MB, but with a slight loss of image quality. I hope you don't mind and still like it.
This file is now available in the Special Folders for supporters, in 2k (Silver, 1080p height), 4k (Gold, 2160p) or 8k (Platinum, 4320p) size depending on the tier. A small 720p version will be used for promotional purposes.