Video file type not supported?

I have recently changed my page to the WordPress ‘Blink’ page and i am having issues uploading video content, mainly via Youtube.

Every time I try and add the URL it comes back back with ‘file type not supported’.

Initially I thought I may need to update my browser but it seems no matter what I do I cannot rectify this.

My old video content is still on the page from the page i had before i upgraded to ‘Blink’.

Can anyone help me??