Millions have viewed video of Jayda Redden — a teen from Johns Creek, Ga., about 30 miles northeast of Atlanta — sharing how a basket toss went horribly wrong.

Jayda Redden is used to cheering for others — she’s been doing it since she was around 3 years old and was on a mini team coached by her dad. Now hundreds of thousands are cheering for the 19-year-old ...