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.
IMO, these are different social media platforms, with few users who would like to use Instagram as well as telegram. My suggestion of Instagram was because of the high number of users the project seems to have on there.