Movie app is capable of MKV's just fine too. MP4, AVI, MKV, all supported with video codec XviD or H264, and with audio codec MP3 or AAC (single-channel).
What isn't supported: MP4's, AVI's or MKV's with other video codecs (hardly ever used anymore) or with other audio codecs (like AC3 (Dolby Digital), DTS and other surround variants). Pretty much like all other phones.
What isn't supported: MP4's, AVI's or MKV's with other video codecs (hardly ever used anymore) or with other audio codecs (like AC3 (Dolby Digital), DTS and other surround variants). Pretty much like all other phones.