I order to get the video code i need to add my domain but

I order to get the video code i need to add my domain but i got message no valid domain?

Embedding Instructions:

1. Make sure you've registered your your domain here: https://premium.wpmudev.org/wp-admin/profile.php?page=vidapi
2. Copy the embed code from the text file.
3. Completely write your post or page including adding title, text, images, tags and categories.
4. Click on Save Draft, previewed your post / page and make all necessary edits.
5. Now click on the HTML tab to switch to the HTML editor and then paste the video embed code.
6. Click Publish. (Note that in WordPress multisite you must be logged in as a Super Admin to be able to add embed code)

Embed Code:

<iframe src="https://premium.wpmudev.org/video/media-library" frameborder="0" width="500" height="281" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>