hi @user_23d1b91bb5e9032a5f96a7f37ac335a9f25c54f2da82dc259a1424, are you asking how much it costs to make videos inside of unreal engine? How much money it costs to render?
Unless you are a company/business making $100,000 USD+ a year or making a video for a business/company that makes that much, it will be free.