You can watch TUDN through several options:

• On cable or satellite TV in the U.S. on providers such as DirecTV (channel 464 HD) and DISH Network (channel 856), plus various cable systems like Comcast Xfinity with channel numbers varying by location.
• Online streaming is available via partner streaming services like Fubo TV, Sling TV, Hulu+ Live TV, and DirecTV Now, all of which offer mobile apps and web streaming.
• The official TUDN app lets you watch the TUDN channel live 24/7, including live soccer matches, by logging in with a participating cable TV provider account. This app is available on iOS and Android.
• TUDN coverage is also accessible on Univision and UniMás channels and through TelevisaUnivision's streaming platform ViX, supporting multiple devices like Smart TVs, Roku, Apple TV, and mobile devices.

So depending on your preference, you can watch TUDN on traditional TV with cable or satellite subscriptions or stream it online through several major streaming platforms and the official TUDN app.