Afterwards, they're mixed with water for consistency, pureed, and loaded through cellulose tubing â according to The Science Channel, it takes 35 seconds to make a chain of hot dogs that would span a soccer field twice over. After all that, hot dogs are cooked in their tubing, cooled, and packed. This footage comes from How It's Made, on the Science Channel, which you can watch on Thursday nights at 7pm/6pm central.