Pluto TV allows users to watch content on one device at a time. This means that a single account can only stream video on one platform simultaneously. If you attempt to start a new stream on a different device while one is already active, you will be prompted to stop the current stream before accessing content on the new device. This single stream policy is meant to ensure a smooth viewing experience for each user. However, different family members can use separate devices with their own Pluto TV accounts if you would like to watch different content simultaneously. For additional details or any policy updates, it is advisable to refer to the official website for the most current information.