Widevine license expiry on Android: four ways it shows up, and how to recover without a black screen

<p>Short-lived DRM licenses are a good idea. A license that lives for a few minutes limits the damage of a leaked key, lets you cut off a user who stopped paying, and is what many content owners now ask for. The catch is on the player side: the license will expire in the middle of playback, and your app has to get a new one without the viewer noticing.</p> <p>On Android with Media3 (ExoPlayer) and

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