Laid back, comfortable, and relaxed. Basic questions regarding interest and experience. There weren't any "gotcha" questions, everything was quite straightforward. Although I didn't get the position, I could tell they really cared about the hiring process and took their time to consider what I had to say.
The interview first started with a phone screening. Then the second virtual interview involved a presentation of a past project or research you have done and what you learned from it and what skills you gained.
Interview questions [1]
Question 1
What was an example of when you struggled with something in a project and how did you overcome this?