I was vetted by the recruiter through a phone call. She set up a video interview for the first interview, which lasted a half hour. He mainly asked me about my experience in my schooling and my previous work experience. He then showed me a brief demo of what I would be working on in this internship.
My second interview was a 20 minute phone call. Basically, he just verified what the first interviewer asked me, and then he was convinced that I was the one for the position. Within a couple days I had an offer.