Support for audio only resources

[glenrobson]

UV version:

 [email protected]

I'm submitting a:

• [ x] bug report
• [ ] feature request => please use the user stories repo
• [ ] support request => Please do not submit support requests here, use stackoverflow

Current behavior: When loading the basic audio IIIF Cookbook recipe I get an error in the console to say Unable to determine media type.

Expected behavior: To load the audio file.

Steps to reproduce: Go to: https://uv.netlify.app/#?c=&m=&s=&cv=&manifest=https://preview.iiif.io/cookbook/0002-simplest-audio-update/recipe/0002-mvm-audio/manifest.json

Related code: When stepping through the code it seems this method isVideo should return false if its not a video but currently it throws unable to determine media type if it isn't a mp4 video or webm:

https://github.com/UniversalViewer/universalviewer/blob/d8f9ec7f1fb1beeb9e6198ca4f27e189aea92b00/src/extensions/uv-mediaelement-extension/Extension.ts#L184

[irv]

Works in https://uv-v3.netlify.app/#?c=&m=&s=&cv=&manifest=https%3A%2F%2Fpreview.iiif.io%2Fcookbook%2F0002-simplest-audio-update%2Frecipe%2F0002-mvm-audio%2Fmanifest.json So this is probably because the av component hasn't been ported to the webpack branch yet

[glenrobson]

This now works so closing.