Brendan,
For whatsapp and other digital messaging interactions in the Genesys Cloud UI, the fully supported file types are "image/png", "image/jpeg", "image/gif" today. However this will
soon change with an attachment supported content feature for digital messaging. This feature will allow admins to choose from a vast array of file types they want to allow inbound and outbound per messaging integration. Please keep an eye out in the coming weeks for an announcement on this new feature.
------------------------------
Greg Boston
Genesys - Employees
------------------------------