Embedding HTML inside posts by Admin

While it is good security practise to prevent arbitary HTML embeds inside posts, it is also restricting me as an admin from embedding iframes and some videos which are not yet onebox supported. I would like the functionality to embed simple html like iframes as an admin user.

Can anyone help me on how to enable this functionality? And how many users here would like a similar setting to whitelist some html tags for the admin in settings?