Other supported video formats: FLC, QT, AVI, 3GP, MPEG-4, MPEG-2, DV, etc. The most QuickTime-Friendly audio format: M4A The most QuickTime-Friendly video format: MOV The Tutorial: How to Convert from or to QuickTime MOV Formatīefore giving the list of best QuickTime converter, we need to know which formats QuickTime supports.