you are sending us a video having 1:25minutes... the first 1:10 minutes is very much uninteresting while we whatch until the app is installed... then you click both buttons and end the video...
depending on your device and the number of mp4 files you stored on that device it takes a few seconds until you get a result... my guess therefore is, you just do not have enough patience to wait for a result...
So test this version and save us the installation process (!) in your video, but record the video from the moment you open the (previously uninstalled and reinstalled) app.
It should be the case since last summer's update that so long as you include the permission block somewhere in the app (I don't think it even has to be attached to anything), then App Inventor should add it to the manifest automatically. Note that it must be the permission block, not a string with the permission name, for this to work.