It's not the most intuitive, agreed :)
We might want to deploy https://imperavi.com/redactor/plugins/imagemanager/ and/or https://imperavi.com/redactor/plugins/video/
Ah, I didn't mind. After years of web development, I kind of like that writing HTML can give my game pages a bit more edge over those who have to look for "Insert image" button.
Talking about intuitive, "reply" and "report" links could be a bit further away/more distinguishable. Almost accidentally reported your message :)