I'm also interested in a working screen recorder for Jolla. I have installed the Aliendalvik Superuser and tried two android screen recorder apps without success. Airshou screen recorder did record, but the outcome was just a green screen.

Update: Tried about ten different screen recording apps in android now. None have worked. Some crash, some says android 5.0 is required and some tries to record but ends up with nothing or green screen.