Virtual, very formal for an unpaid fulltime internship. Promised follow-up, there was never a follow up or a reply to my follow up. Having taken the time to interview it would be nice to at least receive a for sure no.
First you apply and then are given a phone screen (short interview about 15 minutes). If you are selected for the next round, then you are asked to complete a onsite/ Skype call interview depending on your availability.