Encoding videos for Android

[David Bovill]

I've tried 2 videos so far for playback on Android (Nexus 7). Both played
but without showing a picture - that is the sound played. The first was an
.m4v file which I did not expect to play, and then I tried converting it to
a .webm file - this only played the sound as well. The webm file played
fine using Chrome or Firefox.

Any thoughts on how to best encode videos? I'll be testing some other files
- but some tips could save time :)