Aboutredirect_uri

Callback URL & redirect_uri must match
The redirect_uri needs to match the Callback URL of your API key. If these values are different, the authorization server will reject your request.

Unauthorized errors
If the user does not authorize your application, Dailymotion redirects the user to the redirect_uri you specified, and adds both error and error_description parameters to the query

Dynamic redirect uri
If your redirect_uri is dynamic, you can add a slug to your callback URL defined on your API key, following this model:

http://www.example.org/callback/SLUGNAME