Hmm if you are working on your thesis, you shouldn't have any issues finding the answer you are seeking in the internet ^^
After a quick search I've found out already that Google CEO Sundar Pichai was involved in the GDC 2019 and some of the other names you can see when watching that spot you linked.
If you are a member of the press, you could also write an email to press-uk@google.com and try to get an answer to your question. If you are not a member of the press, you don't need to try it as you'll not get a response. (Source)
