Q. What is the Default Stream Media option used in the Studio console?
A. The default stream media option is used to display an image within the Video Source window, for a Video/Audio presentation.
This feature enables a Source that contains no Default Source Media other than an uploaded file, which by default will have no other images attached to the source, to display image for Encoder sources, Phone Sources, and can be used for user sources that do not have an image uploaded to their profile.
For example -
When a phone bridge is pushed onto the platform, users will see the image under Default Stream Media (1) appear within the Video Source Window, unless that phone bridge has an actual image uploaded within the Default Source Media(2).