https://support.dib.no/en/articles/9159245-document-formats
Document formats | Support Center
You may upload Word and PDF documents to dflow
document formatssupportcenter
https://professionalsupport.dolby.com/s/article/Dolby-Digital-Plus-and-Atmos-Streaming-Formats
Which streaming formats support Dolby audio and Dolby Atmos?
Dolby Professional Support
formats supportdolby audiostreamingatmos
https://forums.opera.com/topic/28924/does-not-support-video-formats-it-s-insulting-for-the-opera
Does not support video formats! It's insulting for the Opera. | Opera forums
does notsupport video