[Mobile - Canvas Student] Disclaimer When Posting a Video to Avoid Blank Discussion Posts

Problem statement:

A student created a video for a Discussion reply in the Canvas Student app, but when he clicked "Reply" it posted a blank message with no video.

Proposed solution:

After recording, when the video is processing (and it can take a while even for a short video), you just see a blank screen. Is there a way a message can appear that says, "Do not click the reply button until you see a preview of your video" or something to that effect? Otherwise the student films their video, clicks "Reply" and just a blank message appears in the discussion thread.

User role(s):

student