We’ve rolled out an update which includes support for PDF files, images, audio and other file formats. This update doesn’t yet include support for video files but we’re working on it and will have more to share soon!
An error occurred while saving the commentstuartb commented
Where is the Link Settings/ View-Only feature implemented? - I can't find it so far in Powerpoint 365 or Onedrive. Just see settings for allowing or disallowing editing (which is meaningless since the file can be downloaded and edited) and expiry. Can use modification password to prevent editing, but download still available.