There were two interviews one a Skype video call with the rest of the Intern Committee. The second is a follow up call with the head of hiring after they've decided that they want you. This would be just simple questions to see whether you're really passionate about PR, why you want this internship etc.

2 rounds of interviews. Send resume, cover letter and then wait to hear back. Then go on a skype interview then phone interview, then you're good. You will wait a little while to hear back after your final phone interview but not too long.