YouTube TV allows subscribers to use up to three simultaneous streams with their standard plan. This means that three different devices can watch content at the same time without any interruption. However, there are some exceptions. For live sports and certain premium shows or movies, restrictions may apply, and only a limited number of streams may be allowed. Additionally, while you can have multiple devices linked to your account, only three can access live content simultaneously. It is important to keep in mind that if a subscriber exceeds the allowed simultaneous streams, they will receive a notification indicating that they need to stop playback on one of the other devices before they can continue viewing. For any updates or changes to these policies, it is advisable to check the current YouTube TV website for the most accurate information.