A couple of things that might be helpful:
1. You can directly attach machines to each other in a line as seen in the image below;
ie: extractor->conduit->smelter->conduit->press->conduit->container.
2. Machines can be turned on and off using logic relays. The logic relay needs a signal from another logic device to turn off the machine.
For example, in this image. an item detector is used to send a logic signal through a logic block to a relay which turns off the extractor. This shuts down the entire production line.
3. The video files can be found in the game directory at /QE_Data/Video
You can watch the videos on an external video player, allowing you to pause at any time.