Improve the quality of the preview
I know bandwidth is all, but the quality of a pdf preview or the streaming of a video from OneDrive is at the moment so lousy, that it can not be used.
PDF word previews can not be read at all. Download and open - perfect. Same with the videos.
So if you can't handle the bandwidth, don't offer it. But if you offer it, make it that way, that it can be used!
Nevertheless - good progress in development within the last month!
Another uservoice hoping to get someone somewhere to listen!! https://word.uservoice.com/forums/271331-word-online/suggestions/9498084-fix-the-poor-view-quality-especially-affecting-lar
Another uservoice request on the same issue: https://onedrive.uservoice.com/forums/262982-onedrive/suggestions/7165819-please-fix-the-onedrive-pdf-viewing-problem
The preview image quality for JPGs is unusable on a 1920x1200 screen, absolutely impossible to verify if an image is sharp / usable as the JPG compression is so high it makes everything look a complete mess. As for the slideshow, heh, who'd want to sit through that?
Obviously you can individually download the originals, but that's terribly inconvenient when you're trying to issue proof images to friends or customers.