Visible crew/equipment: Lights from what appears to be the high school football field are visible in the distance during Pickett's charge.
Visible crew/equipment: During Picket's charge, shadows of camera trucks can be seen a lot.
Visible crew/equipment: During the scene when the confederate regiment begins to move up little round top, right after the "7-8 bullets shoved down the barrel line", a audio technician and boom mic can be seen to the left side of the image hiding in the trees. (01:57:15 - 01:57:50)
Answer: In short, the Federal forces (who fought for the North) outlasted the Confederate army. Since it was a 3 day battle, a full explanation can not really be given here, but Lee did not actually have an accurate understanding of the Union's strength and position. While successful on Day 1, by the start of Day 2 more Federal forces arrived and the Union army had taken defensive position on the high ground. On Day 3, there was mixed communications with Confederate commanders and they did not attack as Lee had planned. The Union army was supplied with fresh forces that allowed them to hold the line. On Day 4, Lee did not attack and formed a defensive line, waiting for Meade to attack, so the Confederates could do what the Union had just done to them. But Meade never attacked and that night Lee and the Confederate troops left.
Bishop73