I fail to see the logic in preventing the use of Embed code on a post, if I want it.
Problem 1 - I have 1000s of old post which have embed coded you tube code in them. Every time I go back and edit one of these posts, the *#(#*% code gets stripped out of it.
Problem 2 - The "right" you tube url is not obvious. It requires a special format which is a major hassel to rememebr.
Problem 3 - It's one more thing to train newbie writers on which makes for a huge hassel.
Problem 4 - new services pop up all the time with their own goofy code which may not work now.
WordPress has introduced a bug, not a feature by making it so difficult to use simple embed code in posts.
Is there at least a plugin to allow it? Can there be?