This feature would allow you to view a YouTube video that someone wanted you to see and then reply with your thoughts on it without having to leave the Messages app, go to YouTube, view the app, and return to Messages. At the time, Google said that the feature ended “the hassle of switching back and forth.”
Now it appears that Google plans on bringing this feature back. With Google Messages version v20250319 beta, new strings of code were discovered by code sleuth AssembleDebug that suggests the return of the PiP YouTube video player for Google Messages. The strings include:
Pause Pause YouTube video button Play Play YouTube video button

While AssembleDebug was able to create the PiP window in Google Messages, he could not get the feature to be functional at this time. | Image Credit-AssembleDebug
Google originally added the YouTube video player feature to Google Messages back in 2022 and removed the code in 2024. Based on this pattern that has Google doing something to this feature every two years, its return might not take place until 2026. However, with everything already in place for its return, there is no reason for Google to wait that long to press the button or flick the switch that returns this useful YouTube multitasking feature to Google Messages.