If you've traveled outside your home area or haven't used your YouTube TV account in the past 90 days, you might not see local channels. To resolve this, log back into your account, restart if necessary, and update your home location in the settings. YouTube TV allows you to stream on three devices simultaneously. However, if you attempt to use more than three, some channels may not be accessible. Watching on a computer and a mobile device at the same time counts as two of the three permitted devices. Occasionally, local channels may impose restrictions on YouTube TV, which can't be easily addressed within the app. However, if you're viewing YouTube TV on a television set, consider connecting an HDTV antenna to the TV's antenna/cable port. After running a channel scan, you might be able to access your local stations in this manner.