Wikipedia
Microfilmmaking is the production of ultra-low budget movies. These films generally are made by impassioned filmmakers operating outside the Hollywood mainstream. While a "low budget" Hollywood film can cost millions of dollars, 80% to 90% of all independent films are made for budgets of $30,000 or less.
Without the backing of major movie studio, microfilmmakers have to be resourceful in raising even their modest budgets. They often hold a “regular” job and fund their film projects out of their own pockets. Many begin the filmmaking process by approaching friends and family for donations of money or services.
Microfilmmakers are often the first to adopt new technologies and techniques, economic necessity leading to creative invention. The lack of money leads them to try new ways of doing things, or invent new techniques. Microfilmmakers were among the first to shoot movies on video.