Completely inarticulate? Leave a YouTube comment!
Announcing a new commenting feature: If words fail you, you can paste the link to a YouTube video in your comment. You don't even need to be skilled enough to copy and paste the embed code; just the URL will do. A thumbnail will appear in your comment, and clicking on it will bring up the clip. Shown here: Jason Pontin's deep analysis of yours truly. This feature is still being tested, so please report any bugs you encounter.