Having audio and video presentations have been common since three decades ago. Do you still remember betamax? How about the later version, VHS? They were tape media which no longer exist now except for memorabilia. The disk versions started from VCD and now DVD.
When watching movies through a projector sometimes it happens that there are video distractions like static signals and sometimes erratic connections. The static signals happen usually when the audio video cables are running side by side with the power line. The erratic disconnections happen usually when there is an additional connector between the source and the destination. To have a better connection, use the right length of cable from end to end.
