To be fair to the developer, I think he is a mac/iphone person and I'm pretty sure this app was originally developed for iOS, hence the name mcpro. So he may not have known about the protected directory...as the media folder is a sub-directory of his app's folder in this android/data folder. But I agree that it's a strange place to put the media. He did say it's sandboxed. I'm familiar with that term with computers in general but not sure why the camera media needs sandboxing.
Also, he is developing the best android video camera available...well worth the $15 to record video in 10 bit color UHD at 500Mbps constant bitrate with no dropped frames...not even Open Camera has that option..and that app has every option or so I thought until this one came out.
Rukbat - if I'm catching your meaning properly from your bracketed comment, I really, very much don't believe that there is anything nefarious about it or shoddy or lazy. He has definitely put a huge amount of work into this app and I really think it's an oversight..or necessary for some reason we are not thinking of.