Film distribution involves getting a film seen by as many people as possible through various methods like websites, festivals, and shipping copies to different places. Distribution companies help filmmakers with their resources and contacts to distribute films widely. Some popular companies known for thriller genres that may be suitable for the filmmaker's project include Hammer Films, Kaleidoscope Films, and New Line Cinema, though the largest companies would be difficult to work with. Self-distribution is challenging due to the costs and lack of experience needed to effectively get a film seen.