Hollywood likes bundling a bunch of good-looking teenageish boys for movies about Texas football because it checks off boxes in a whole bunch of marketing demographics. The latest installment of inspiring underdog gridiron mediocrity is “12 Mighty Orphans” (2021). Based on a true story (aren’t they all?), this heartwarming tale of Dust Bowl grit, determination and long speeches by Luke Wilson introduces us to a Fort Worth children’s home that captured a Depression-era nation’s attention. The filmmakers inject it with the typical melodramatic steroids of teenage hijinks and overbaked subplots. Still, it’s worth waiting for the mini-bios during the credits.