I saw many times dreamr profiling on Instagram is very active they updates or post almost every day . i myself came to know about this project through Instagram So i feel if the team will conduct AMA session live there that will be more interactive and one to one communication about the project related doubts.
A webinar on Instagram would be awesome. Dreamr has all earned a huge number of followers on Instagram and that comes with the attention they so dearly needed right now. I think they can put this into use by holding weekly AMA on Instagram.
Am also of the opinion that the AMA on Instagram would yield a lot of viewers and several people may need to sign up to Instagram for the opportunity to participate in the AMA. I personally would join the AMA if it's conducted in Instagram. The team could conduct a survey on their telegram group to get a statistical feedback from community members on the use of Instagram for the AMA.