What was the "good piece" of—a cool action shot, a security catch, or something else? VLC for Android – Apps on Google Play
If you're looking to view or edit it, the MP4 format is widely compatible across almost all modern devices. YI1004484.mp4
If you're having trouble playing it, the VLC Media Player is a great "universal" choice that handles most codecs. What was the "good piece" of—a cool action