Great news for mobile users.
I fixed the profile pages. So now you can see what other people post or see what you posted in any page but the groups. You can also block users now. I will continue to try and fix the longer then 20 minutes videos no uploading for mobile users. Sometimes they do and sometimes they don't. For now you can edit the video and try again or close the tab and try again. Just experiment around. If nothing works share the video from YT or Vimeo. You could also upload it from your computer. Just plug your Android into the computer and allow file transfer. I haven't had any issues uploading long video on laptops. I have tried a few times.