I can second what you said here.
We went to a big german television department recently that does the social media (including YT, Instagram etc.) recently, as part of our campus Radio.
This is pretty much the feedback they gave us for our own Instagram.
Especially important are Videos, getting your followers to interact and Content that keeps you coming back for more. (Don´t have the time to actually do this rn, but I´ll try to in the future ehem)