After Spencer and Dayton's story was made into a video called "Dayton's Legs," on youth.lds.org, a Church member in Florida sent the video link to his friend Tracy in Arizona.
Tracy knew that a Church that taught young men to serve like Spencer and Dayton was a Church she wanted her sons to be a part of. She went to church with Spencer and Dayton's families and met with the missionaries. The Spirit bore witness of the truth of the gospel, and Tracy and her family were baptized.
You can share the gospel by doing something as easy as sending a video link from youth.lds.org. You never know whose life will change.