I am trying to create a multimedia component for youtube videos.I have created the following schema allowing Mpeg Video type.

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However, if I try to create a multimedia component with external URL, it is throwing an exception reated to file extension.

Invalid value for property 'Filename'. Unexpected file extension: . Expecting: mpg,MPEG.

Any help is greatly appreciated!

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2 Answers 2


The problem is that you need to add allowed extensions for this file type. So go to Administration, then Multimedia types and select type there and update it.

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  • Well, looking at the error message, the unexpected file extension is an empty string. You would have to add an empty string as File Extension on the MM type; I don't think that is allowed. So: the root cause here seems to be that there is no file extension in the URL. Dec 2, 2021 at 16:29
  • true. not sure about youtube video in link....
    – Marko Milic
    Dec 3, 2021 at 9:38
  • Hi @MarkoMilic, Thanks for the response. Could you tell me what extension type should be updated for youtube video url?
    – ragmn
    Dec 3, 2021 at 13:41

Why not implement as already proven in this implementation?

You don't have to use DXA to render the final piece - any application can consume the same content but at least you'll be using something that's tried, tested and even documented.


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