Create Account Systems for a webpage / YouTube Analytics

We need an Account System to be created for: [login to view URL] We create Video advertisement for others, which is then uploaded to our YouTube Channel, then we provide the client with a link to their "App Trailer", so the client can distribute it and embed to advertise their App or product. We need our clients to be able to Sign Up, Log In, and look at their "App Trailers" or videos, as a list of videos or a list of links. Inside their account, our clients should be able to retrieve YouTube Analytics right from our YouTube Channel for any specific video. Maybe the following link helps: [login to view URL] Other features the account system should include are the standard: being able to change password, etc. Our budget is very limited, and we don't need this to be a work of art for now, simply functional. Thanks!