Encountered the BIG problem with VideoView Nexus 10. Looks serious.
I wanted to create ListView with Videos that play simultaneously (with no sound). So problem: single VideoView plays but when there more then 3 (four VideoViews) play at the moment - nothing - black View (4th).
Even more ! If you place Video at /sdcard/ After you encounter the problem NO MORE VIDEO (from SdCard) CAN BE PLAYED AT THE DEVICE AT ALL until reboot. Yep! Other Application can't play video from SdCard any more, too!