Filename was not accepted - video embedding

I have a problem with a filename when I try uploading the zip file..
Articulate generates automatically a placeholder .jpg file.
The filename looks like this:
mobile/62v7eOWYmvB5tr6jhzfDgV{Width=1679,555, Height=778,9375}Light_DX3360_DY3360_CX1680_CY779.jpg
The Filename includes the with and height of the video object in curly brackets - added automatically from the embedding code. 
Are the curly brackets the problem? can I delete the jpg file and upload the zip folder without that file?
will it still work? 
Thank you for your help :)

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