Our sister site PreparingToGo.com includes videos featuring experienced missionaries who share about their journey into missions and answer questions about mission service and the process of becoming a missionary.
Be encouraged by the five-minute cardboard testimony of those who overcame various obstacles to become missionaries (GoWestAfrica).
To consider the diverse ways people can be part of missions, see the free video series, 6 Ways to Reach God's World (OMF and Perspectives).
Some of the most popular free, inspirational videos on mission topics can be found in the HistoryMakers collection.
Many mission agencies create videos. While some of the videos describe the agencies and their work, others are of more general interest. See, for example, the video streams for Wycliffe, OMF, Pioneers, and OM USA.