Welcome to the Mi Video Sub-Forum. Kindly read the General Rules of MIUI Global Forum and Rules and Guidelines in Mi Video Sub-Forum before making any post, and here's the Frequently Asked Question collection for Mi Video that will be updated regularly.
Stock MIUI Video Player that present on any MIUI ROM. It comes in two version: China and Global, depends on the ROM variant. The main difference between them is the online content.
What's the format that Mi Video can play?
While there's no documentation, Mi Video can and will play many popular formats such as 3GP, MP4, MKV, etc. But it can't play some particular formats like M4V due to patents.
Why I can't play some videos on my phone while I can play the others with same format?
It might be bugs, corrupted file, or high chance that you don't have proper codec that installed on your phone. Same format doesn't mean it use same codec. It might be using x264 [AVC] or x265 [HEVC]. Better check the codec that installed on your phone with AIDA64or Media Codec Info for further information.
What is the difference between x264 [AVC] and x265 [HEVC] video?
The difference is the compression. Video with x264 codec is limited to 4K resolution with 60 FPS, and x265 [HEVC] can be maxed out to 8K resolution with 300FPS.
Can Mi Video play x265 [HEVC] video?
How to check which codec that used for my video file?
So far, there's no stock MIUI app that can do it, but you might try to use VLC or MX Player to see the video codec information, or you can check in on PC with MediaInfo that available in standalone version or comes with K-Lite Codec Pack.
Sujayb + 10 + 3 Great!