Now in this initial prototyping phase dont be unwillingly selfish.
Think how bbPress forum owner(s) would like to give Users option to insert Embeds in forum Topics, Replies. I cannot give any suggestion right now, because I dont have any,

Same is for front-end discussion/comments. Before WP core was not known precise to think about it, and mostly ignored this issue. We were left alone to try different snippets to see what worked. Most of them not.