No worries. I'm glad you've taken enough interest in the site to want to post videos. It's good to run a search before posting vids, but I'll be honest, the search feature is not always reliable. If the worst case scenario is that we end up with extra copies of excellent videos, it's certainly not the end of the world.
Ah, I feel a little awkward doing this twice in a row (I don't want to discourage anyone from contributing videos), but the Sam Harris video has also been posted to the site (just a few hours before you submitted it). A lot of videos from celebrity atheists tend to go up really quick, so this sort of duplication is pretty common.
Thank you for adding me to your friends, David; and especially thank you very much for your kind words. I'm so glad you decided to join us, hope to see you around the community very often. I love it here.