2013 Wi-Fi models of Nexus 7 running on Android Lollipop have video playback issues
It doesn’t come as a surprise that software updates come with the occasional bugs. This time around the new Android 5.0 Lollipop update seems to be causing trouble for some of the 2013 Wi-Fi models of the Google Nexus 7. After updating and watching a few videos, the video player seems to get lost and your system can’t locate it. You won’t be able to access videos using pretty much most players.
We’re hoping Google addresses this soon but temporarily what you can do is watch videos on a different device. Or you can try displaying the “Use NuPlayer” option in the developer options menu, reboot the device, or wipe the cache from your device.
Source: Android Headlines