Can there only be a single ’Multimedia” Macro per page?

[Michael Schuman]

Can there only be a single ’Multimedia” Macro per page?
I have an existing demo video using the macro on a page - when I try to add another video to that same page (using the 'Multimedia' macro) the File pop-up menu doesn’t present a file browser, it just shows me the file that’s already on the page:

[Brant Schroeder]

@Michael Schuman Welcome to the Atlassian community

You can have multiple on the page.  You will need to make sure that you have multiple supported files attached to the page that you would like the macro to play.  https://confluence.atlassian.com/doc/multimedia-macro-228622735.html   Sometimes attachments are linked on a page but are not actually attached to that page which makes it so they do not appear in the macro as an option for you to select.

[Michael Schuman]

Actually it was an unsupported file format issue. I was trying to upload a file with the .m4v extension. When I changed the extension to .mp4 it uploaded with no issue. The bug in this case is that Confluence rejects the upload silently with no feedback / UI as to why the file is not uploading.