Android has more than one video-related security hole on its hands at the moment. Trend Micro has found a flaw that uses a malformed Matroska (MKV) video in apps or websites to crash Android's ...

AVI and Matroska are just container formats. What makes a difference is how the contents are encoded. Most MKVs I've seen use the Theora video codec which is more resource-intensive than DivX (MPEG4) ...