When I select "+" to attach a small mp4 audio file to an MMS message using "Messages" app, I can select smileys, camera, gifs, favorites, location or microphone, but I can't find how to select the file of interest to include. Will someone advise, please?
Nexus 6P Android 8.1.0 OPM6.171019.030.E1
Nexus 6P Android 8.1.0 OPM6.171019.030.E1