Maybe you could take the time to tell me how to "temporarily disable the embed.ly "  

Right now, in settings > general. I can select 'none' as the embed provider and leave all  the fields blank, and embedly still works. The actual embedded content, uses a key that I have no idea where it comes from.  If I select 'embedly' as the embed provider, and use my own embedly key, Embedly still works, but it doesn't use the key I entered.
Entering iframely settings has no effect. It's like these settings in studio do nothing. This is very strange behavior.