Indeed, that did the trick! Thank you!
So, is the key thing here that Premiere interprets the Alpha in the video file differently?
It just occurred to me to try this in Final Cut – which I haven’t really used for a while. I imported the animation there, and it worked straightaway. Is this because Final Cut and Motion are more “tuned up” to work together? And Premiere simply has different default settings?
Anyway, I’m really glad that it works now. Thanks again!
BTW, I’m a big fan of your tutorials in YouTube, keep up the good work!
(Now it would be really embarrassing to find out that you had actually covered this subject in one of your videos…)