Steve Saint (yes, his real name) is a missionary who developed this flying car, called the Maverick, to help natives in remote regions of the Amazon access health care in fulfillment of a promise he made to the Huaronai tribe in Ecuador that killed his missionary father and four other missionaries in 1956.
The tragedy was recounted in Elizabeth's Elliott's book Through Gates of Splendor and also made into a movie. Steve Saint wrote his own book about his father, The End of the Spear, which was also made into a movie.
The video is about 6 minutes long and doesn't discuss the purpose of the flying car until close to the end. It's well worth watching. Christianity Today had a lengthy article about Spear and his flying car here. For more information, you can check out the Maverick's website.
The FAA has certified the Maverick as airworthy, and surely God will bless the mission Saint developed it for.