Google

Start the video. I'll ask you some questions and finish the video. It's not very hard. Honestly, I think if you study and prepare, everything will be fine. Don't worry too much about it.

Really good. I had to write a program and test it.

The interview is very in-depth but casual. They love to ask questions, but they are manageable. It's not impossible; just stay positive and continue moving forward with the questions. The people are nice, so it's not an uncomfortable interview.