Hello hello. Minor update - the Video tab ("Watch" tab?) seems to have reared its ugly head, complete with red notification badges for things I never cared about in the first place, which Facebook wants me to care about because they're trying to grow their video platform. Sigh.... I thought I had taken care of this (like I did with the Marketplace tab) and yet the Video tab is back. I guess they weren't pushing this to me when I made the 16.1 release, so I had no way to test the patch for the Video tab... but after a minor tweak, that patch is working again.
This is a minor update to the 16.1 experimental release, but I'll leave it in a post for a few days, before updating the top post. If you actually like the Video tab, it should be fine to stay on 16.1.
As for the compatibility/installation issues, hmmm. The base APK that I used for this release was labelled as being for "Android 5.1" on apkmirror (or so I remember, anyway), but looking more closely, it looks like the APK requires minimum API level 26, which corresponds to Android 8.0. This unfortunately leaves a lot of older devices in the dark. I've been meaning to go back to using the Android 4.1 version as the base APK, but they are using a new "redex" format for packaging the DEX files, and between work, work, startup life, work, more work, and the revent PG&E power outages, I have not had any time to try to reverse-engineer this yet. Some things about it seem straightforward, but there seems to be a lot of extra data that goes with the DEX files, and I'm not quite sure what to do with it. When I have some time, maybe I can take a look. In the meantime, the previous release should continue to work for Android 4.1+ devices. Yes, the "new UI" has a new color scheme, but you really aren't missing anything.
As always, have fun, and good luck!