Videos imported from MS Office Mix files

Has anyone imported Microsoft Office Mix files into Storyline and tried to edit the videos in SL? I've never imported any Powerpoint files with videos so I'm not sure if those present the same problem. We had to use Mix last year while our university was trying to choose a new content authoring tool and finally picked SL. I am finding that these videos can't be edited or trimmed within SL. I also couldn't export them out of the Powerpoint files to be saved and edited separately. Is there any way to determine what type of files these video clips are? I know some file types can not be edited by the SL video editor. Any workarounds anyone can think of will be greatly appreciated. Thanks in advance for your help!

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