I applied through university. The process took 2 weeks. I interviewed at Regeneron (Tarrytown, NY) in Feb 2016
Interview
First round was recording yourself answering questions on an online portal. Second round was interviewing over a video call. Whole process took about 2 weeks and was very straightforward.
I applied through an employee referral. I interviewed at Regeneron (New York, NY) in Feb 2015
Interview
Online video response interview, there were about 10 video response questions. You were given as many retakes as you wanted for some questions, provided you finished within the 1 hour time slot. There was also a phone screening.