An app with instant video posting capability and rewards system will be some game changing forum shit and would take this to a higher level.
I also believe to attract the younger crowd of posters it would be wise to Interview rising YouTube stars on the allhiphop site and do a set up Reddit QandA style for fans to interact with questioning. That way on social media outlets like Instagram and Twitter it can be advertised to sign up to AHH/IC for the opportunity to engage, as well as generating clicks to the site.
That way you can grow a newer crowd, keep folks engaged with future interview/QandA interactions, and ultimately give the AHH a relevant experience with the current generation and past (OG in the game interviews /QandA can be done as well)
This can be a platform for sports, music, fashion, etc. That way you are hitting on all aspects of urban/pop culture.