Suggestion: answer the question “how is this different from just using your normal calendar” to plan your day. Because lots of calendars have ToDo / Tasks functionality, and you can simply block out time on your main calendar - instead of using this app.
EDIT: also, I see lots of reference how not using this app is harder because “No overview. It's all scattered across multiple apps”. Is that really a problem? I use 2 emails (1 work, 1 personal); however, I only maintain 1 calendar / todo (my work calendar). It seems like introducing a new app is introducing something that will cause more scatter (as opposed to my current setup today).
EDIT2: take a look at using the following service to compress your mp4 video. I got it down in file size from 650kb original to just ~200kb with almost no noticeable quality loss. https://www.freeconvert.com/video-compressor