It's just the way the man is reading it and hoping it was the way he wants it to sound.
The way it should read is any rifle with less than 16" barrel and any rifle with an overall length less that 26" is a short barreled rifle.
He is reading the sentence as a combination of less than 16" barrel and less than 26" overall.
They are describing 2 different guns he reads it as one combination gun.
Won't matter how he reads it the upto $250,000 fine and upto 10yrs in prison is pretty clear per violation whether it is two separate guns or one combination gun.