FINALLY!
I finally found what I have been looking for, that is. (Isn’t that a U2 song? But I digress.) I’ve seriously been searching for an iOS app that would allow me to take an existing square or portrait video and format it for landscape (16:9) with a blurred background. This. Is. It. Okay, the app has a dated interface: it looks like it was created for iOS 6 and never updated. But I can overlook that if it does what I need quickly and in a straightforward manner. This app scores on both counts — and it was indeed updated only last month. Maybe my praise is a little much for a $2 app, but I’m ecstatic that I found this and that my workflow has gotten a lot easier.