Unable to play MP4 Movies on IPAD Air Using ReadyCloud for Ipad

Back when all of my devices were Apple I encountered similar issues. I was not able to fix it. However, I found a workaround. Any MP4 files that I needed to watch from my iPad or iPhone I would convert to a suitable and supported format beforehand. I used this software https://okaapps.com/product/1536071582 since it is free and works on Mac. It is pretty handy for simple conversions like this. Since then I have transitioned to other tech manufacturers. I find it way easier to access all sorts of files with their products and their software. Hope this helps!