By Jarrod Castillo The United Football League (UFL) kicked off on March 30. Amid a plethora of new rule changes, one stands out: First downs will now be determined using six 4K cameras situated at different areas of the stadium. Instead of using the traditional method – using sticks and a chain to determine a first down – the UFL will utilize what’s called “TrU Line Technology.” It is an advanced optical tracking system that can measure whether a first down was achieved more accurately than previously done before. “This innovative technology promises to deliver ball-spotting with unprecedented…