This is an excellent video documenting some Flock camera vulnerabilities by Benn Jordan, a security hobbyist/researcher: https://www.youtube.com/watch?v=uB0gr7Fh6lY. It's a bit long, but worth it.
https://www.youtube.com/watch?v=4_SxlRQhHOA&list=RDZD8N9tDDQT4
https://www.youtube.com/watch?v=-vzXHhRBLnA&list=RDTgoAgYR4584
https://www.youtube.com/watch?v=XHCg47cWIUc&list=RDXHCg47cWIUc