Video File for Articulate Workshop

I am creating a series of workshops that will have webinar videos in them. The webinars currently live on Vime & are password protected. I'd like to download them, then upload them into the articulate. What file version is best for Articulate? I'm getting the following options from Vimeo:

Mobile SD

SD

HD 720P

"Original" (and I don't know what that means...)

 

 

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