The Apologia Studios has some wonderful debates and discussions with Mormons in front of the temple and elsewhere. Many if not all of these topics are covered. Years of content. The debates are respectful and Biblically sound using the Mormons own resources.

There's even a guy (not from our church) that's famous for bringing a radio flyer wagon with steel replicas of the tablets Joseph Smith said he hound in gold with the same dimensions and he challenges Mormons to try to pick them up. Then he asks if they could run from a wild animal with them.

I'm at work so I can't browse for any videos on youtube or much of anything. Let me know if you have problems finding something though.