AlphaSights People Operations interview questions

Submitted my application through their website and got an email about a week later asking me to submit a video interview within 48 hours. Had to answer about 8 questions from anywhere between 30 sec. to 1.5min. I was prepared for half the questions they asked. While I can see why they would ask certain questions, I'm still not sure why they choose to use this video interview system rather than just doing a skype interview/google hangout/phone interview. I found the time constraint a little frustrating.

Found the job application on my university site. They scheduled a Google Hangout right away. As I was waiting for the Hangout, no one was present. After a few minutes past the start time, I called their office and it turns out that the Hangout was a default setting and I was actually supposed to just speak on the phone....This is was a chaotic and disorganized mistake on their behalf. The phone interview was an hour and fifteen minutes long--questions included standard behavioral questions and explaining some of my decision making with my major and school. Next, they invited me onsite and only paid $200 for the $400 plane ticket and hotel. The onsite interview was less than ideal. I had thorough conversations with the first two analysts about my passions, the job, and my goals. Then, the recruiter I spoke to on the phone told me I'd meet with the man who runs the firm and two more analysts. I met with the head of the firm and we had decent conversations, but his eyes were very red and I saw him yawn. Then, he proceeded to walk me out without any explanation about why I was not interviewing with the other two analysts. This was disheartening and made me feel like despite the fact I flew in and put so much effort and energy into the interview, that I was not good enough for everyone's time or even an explanation. The email said to block off 2-3 hours for interviews and it lasted just about 1.5 hours. I received an email 1.5 weeks later saying I did not receive the job.