Google is updating how YouTube on smartphones interacts with televisions, moving away from the traditional Cast protocol. The company is now referring to the mobile device as a "companion" and has replaced the classic Cast icon with a more generic one. This change, which reportedly began testing in early 2026, is now being rolled out broadly.
A significant change is the removal of the requirement for both devices to be on a shared Wi-Fi network for casting. Instead, users must be signed into the same Google account on both their phone and television. This shift aims to reduce friction in the casting process.
The update introduces several new functionalities. Users can now like videos, leave comments, and subscribe to channels on their phone while the video continues to play on the television. Additionally, the system allows for consuming YouTube Shorts content on the phone while a different, full-length video plays on the TV. A "Play on different device" option is also integrated into the menu button for every video in the homepage feed.
While the account-based pairing is expected to improve private viewing sessions, it is unclear if this update completely replaces the existing Wi-Fi-based casting method. The traditional Wi-Fi casting is often used in group settings, and its potential removal could impact this common use case. The changes are generally seen as a step towards streamlining the second-screen experience for YouTube.
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YouTube is rolling out changes to its app-to-TV experience, allowing users to cast videos without both devices being on the same Wi-Fi network, instead relying on shared account logins. This update introduces features like background interaction and Shorts consumption while a main video plays, streamlining the second-screen experience.