Hmmmm. Possibly, if you can get me the log file (https://forum.unity.com/threads/how-to-capturing-device-logs-on-android.528680/) I can have a look.
I can't find a reference for 6.1 (it jumps from 6.0.1 Marshmallow to 7.0 Nougat) but it's a very old OS, and I'd worry that Making Movies isn't really optimized for old androids. I use quite a lot of RAM (since it's a 3D game under the hood), and things like the animations and videos probably wouldn't play nice.
Sorry about that.