The DistrictWow, I'm surprised that I haven't talked about this yet! The District is a web series made by the church that gives a personal account of the lives of missionaries. If you haven't seen it yet, you have to.
The second season was filmed more recently than the first, and it focuses more on Preach My Gospel style of teaching, so if you haven't watched any of it yet, I'd watch the second season first. I'm very much biased; I love the segments about the sisters, and I feel the Spirit so often while watching them teach and watching their activities throughout the day. There's no doubt it my mind that the Lord really does work through missionaries to bring salvation to many.
So, go watch an episode or two! Each episode is about 30 minutes long.