I am designing an app for a piece of software. In a section of this very complex app, users can add photo/video/audio/excel/word files. Once uploaded, they can view them in a large thumbnail grid.
The problem is, to have a preview of the recorded video as the thumbnail image, it will take too long for the user to upload if on a anything other than an amazing device.
Are there any other options I can use here without it just being an icon? Otherwise, we will have icons for every other file that's not a jpeg, which would look rubbish.
Or is there an easier way to code it?