Phone Call: Very basic, asks about resume, SAT scores, about 15 minutes long
Video Call: about 6-7 behavioral questions, "tell me about yourself", about 30 minutes long
In person: Tour of the facilities, have 30 minutes to solve a problem, 30 minutes with two different people on the job where you just have casual conversation, present your answer to the problem (2 interviewers) and then they ask questions