That seems unlikely and the equipment description seems to show no DirecTV:
https://www.united.com/web/en-US/con...efault.aspx#v3
Is the flight in the new few days? Its possible you are getting a swap.
I did a test booking for IAH-LAX 7/23 UA1169 and it does not show DirectTV
https://www.united.com/web/en-US/app...&FSD=IAH&CC=UA