You can activate the Miniplayer while watching any compatible video on your computer:
: If it isn't working, check your device settings under Apps > Special app access > Picture-in-picture (Android) or Settings > General > Picture in Picture (iOS) to ensure the feature is enabled. How To Turn On Miniplayer On YouTube - Step By Step MSDMiniplayer
: Hover your mouse over the video player and click the Miniplayer icon (a small square within a larger square) located in the bottom right corner, typically between the settings and theater mode icons. You can activate the Miniplayer while watching any
: Press the I key on your keyboard to instantly toggle the Miniplayer on or off. : Once active, the video shrinks to the bottom-right corner
: Once active, the video shrinks to the bottom-right corner. You can now search for other videos, check comments, or browse your homepage without stopping the current playback.
: Click the X in the top corner of the Miniplayer to close it, or click the Expand icon to return to the full video page. How to Use on Mobile (Android & iOS)
For mobile devices, this feature often works as part of "Picture-in-Picture" (PiP) mode: