By Daniel Bates The first grandson of football is heading to Austin, Texas after one of the most closely-followed recruitments in recent memory. But looking back through the tea leaves, should it have been clear that the nation’s top prospect would be a Longhorn the whole time? After Arch Manning made his official decision on Thursday, a 2016 clip started making the rounds on the internet. In the video, a young Arch is wearing a burnt orange Texas t-shirt and while he stays pretty quiet standing next to his brother, one thing comes across clear: “I want to go to Texas.” That’s exactly where th…