+ <<0x1a, 0x45, 0xdf, 0xa3, _, _, _, _>> ->
+ "video/webm"
+ <<0x00, 0x00, 0x00, _, 0x66, 0x74, 0x79, 0x70>> ->
+ "video/mp4"
+ <<0x49, 0x44, 0x33, _, _, _, _, _>> ->
+ "audio/mpeg"
+ <<0x4f, 0x67, 0x67, 0x53, 0x00, 0x02, 0x00, 0x00>> ->
+ "audio/ogg"
+ <<0x52, 0x49, 0x46, 0x46, _, _, _, _>> ->
+ "audio/wav"