dumb question, how do you post youtube videos?

Not a dumb question at all - I wish a few more people would learn to use the feature. What Reject said is correct.

Hit upload. 🙂

You click on the leftmost little picture above the comment box just to the left of the smiley face and then you choose "insert video" from the options and paste in the link for the YouTube video then success!

Click the upload button on the top right of the page, then drag your video into the right spot, and it'll start uploading. From there, put down the description, the title, the tags, etc.