Hi there, I completely understand you want to build a website using media wiki. Now media wiki has some limitation. But I can develop a website for you that will be expandable as you want. Like if you want a forum, You will be able to have it. If you want to embed video, you will be able to do that. Please send me a message and I will show you what I can offer you. I am not a timewaster. Please check my profile. Kind Regards,Raaz