: Touch and drag the player to move it anywhere on your screen. You can often pinch-to-zoom or double-tap the window to change its size.
: Hover over the mini window to access pause, play, and skip controls. 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. : Touch and drag the player to move
: Press the I key on your keyboard to instantly toggle the Miniplayer on or off. : Hover your mouse over the video player
: 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
For mobile devices, this feature often works as part of "Picture-in-Picture" (PiP) mode:
You can activate the Miniplayer while watching any compatible video on your computer: