You need to upload your craft to a file sharing website (I recommend KerbalX), and then submit at least your name/username and a link to the craft here. If you register an account on my website and log into it (look at the bottom of any page), you will be able to edit your submissions.
You can also still use the public hanger on KerbalX. The interface is pretty bad, but it looks like this (after clicking "add to hanger" and then "add to open hanger" from your craft's page). (Note that I don't check these often, it is a better idea to submit your craft here.)
I pick randomly from the planes that have been sent to me, because I receive so many, and people tend to send several designs at once. I also delay designs that I have recently covered. However, when I get a lot of a particular replica submitted, I will often do an episode of all the same replica from different people. This means it could be anywhere from immediately after to submit to .. never. I'm sorry about that, but I'm only one person with limited time.
The biggest reason is probably a lack of time. It also may be because I don't think there is anything to be gained by my reply. I don't answer things that are answered in the video, can be easily Googled, or when people ask things in a rude manner (for example, in all-caps).
I say "pro" very quiet and fast. In combination with the bassy sound of "pro" and my post-processing to remove background noise (which is also bassy), this makes the "pro" usually inaudible. If you look at the waveforms though, you can see it's there.