Yes, you can watch your AT&T TV on your computer. To do so, you will need to sign in to your account and then select the 'Watch TV' option. Once you have done this, you will be able to view all of the channels that are included in your package. If you want to watch a specific channel, simply click on it and then select the 'Watch Now' option. You can also record shows and movies to watch at a later time by selecting the 'Record' button.