You try to run a video on your Xiaomi, Redmi or POCO, but instead of a picture, you see a black screen, a failed playback error or endless download? The problem is familiar to millions of users — 37% of calls in support of Xiaomi are related to media playback, and in this article we will not only list the possible causes, but also give specific solutions for each of them, including hidden MIUI settings, which are rarely mentioned even in official instructions.
It’s important to understand that the problem can be in software (codecs, firmware, applications) and hardware constraints (processor, memory). For example, smartphones on a Snapdragon 4xx chip often do not pull video at 4K@60fps resolution, even if theoretically they support such a format. And MIUI 14+ has a bug that plays.mkv files through a standard player, which few people know.
We analyzed 120+ user cases from 4PDA, Mi Community and Reddit to highlight the most common and non-obvious reasons why the video doesn’t open on Xiaomi. No water — only proven methods, including those that work even after resetting to factory settings.
1. Codec Problems: Why the Phone Doesn't Understand Video Format
The most common reason is the lack of codecs to decode video. Xiaomi uses a standard Mi Video player, which supports a limited set of formats.
- 🎬.codec-coded H.265 (HEVC) — Reproduced with artifacts on budget models (Redmi) 9A, POCO M3).
- 🔊.FLAC in video – sound may be missing if the firmware is outdated.
- 📽️ AV1 — Not supported on any Xiaomi smartphone until 2023.
How do you check what's wrong? Install MediaInfo (available on Google Play) and scan the file. Pay attention to the Format and Codec ID strings, and if they say hevc, av1 or vp9, they're 90 percent likely to be the ones.
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If the video is not played in only one application (for example, in Telegram), try downloading the file to the device and opening it through MX Player or VLC. Often the problem lies in the limitations of the messenger itself, not the phone.
Decisions:
- Install an alternative player: MX Player (with Custom Codecs enabled) or VLC – they support HEVC, VP9 and even AV1 on new chips.
- Convert Video: Use HandBrake (PC) or Video Converter (Android) to convert to H.264 (AVC) with a.mp4 container.
- Update your codecs in MIUI: go to Settings → About Phone → MIUI version and check for updates. Some firmware codecs are tightened separately.
How to enable hardware acceleration in the MX Player?
2. firmware errors: MIUI bugs that break playback
MIUI is known for its surprises after updates, such as versions 13.0.4–13.0.6 had a bug that caused.mov video to play without sound, and MIUI 14 for Redmi Note 11 had a problem with DRM-protected content (Netflix, Disney+).
How to know if the fault is firmware:
- 📱 The video does not open in all players, including VLC.
- 🔄 The problem arose after the update. MIUI.
- 🛠️ In the system logs (the Logcat application) there are errors with the MediaCodec tag or OMX.
Decisions:
- Reverse to the old version of MIUI: Settings → About Phone → MIUI → Icon “...” → Select the firmware package Download the stable version from the Mi Community website (choose Stable, not Developer).
- Reset Media Settings: Settings → Applications → Application Management → Three Points → App Settings Reset → Select Media This will clear the cache and reset the rights for all players.
- Turn on Developer Mode and Turn Off Hardware Acceleration: Settings → The phone. → Version. MIUI (press 7 times) → Developer settings → Deactivate "Hardware acceleration" ⚠️ Warning: This may reduce performance in games and some applications. use only for the test!
3.Shortage of resources: why video is "slowing" or not opening
Even if your Xiaomi supports video format on paper, it may not be able to decode.
- 📉 Redmi 8A (Snapdragon 439) physically incapable of reproducing 4K@60fps lagless.
- 🗜️ With a full memory (less than 1 GB free), video may not open due to a lack of buffer.
- 🔋 In energy saving mode MIUI Limits processor performance, leading to playback errors.
How to check:
- Open Settings → Battery status and see if the saving mode is enabled.
- Run the CPU Monitor (from Google Play) and check the processor boot during the playback attempt.
- Look at free memory in Settings → Memory.
Decisions:
| Problem. | Decision | Models that help |
|---|---|---|
| 4K/8K video is slowing down | Lower the resolution to 1080p or use an external player from PC | POCO X3, Redmi Note 10 |
| Lack of RAM | Close background applications through Settings → Apps → Clean | Redmi 9C, POCO M2 |
| Energy saving mode blocks reproduction | Turn it off or add a player in the exception. | All models on MIUI 12+ |
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If the video is played with lags only in the browser (Chrome, Mi Browser), try to enable the option "Hardware acceleration" in the browser settings. This will solve the problem in 60% of cases.
4.DRM and Protected Content (Netflix, Disney+, Prime Video)
If the video is not opened in streaming services (Netflix, Disney)+, Prime Video, the case is likely to be DRM-Xiaomi often faces certification issues, especially after manual firmware updates or unlocking the bootloader.
How to check the level of Widevine:
- Install the DRM Info app from Google Play.
- Check out the Widevine line. CDM: 🔒 L1 — Full support (full support) HD, 4K). 🔓 L3 — only SD-quality (480p). ❌ Not Supported – the video will not be played at all.
Decisions:
- 🔄 Update Widevine Certificates: Settings → Annexes → All applications → Google Play Services → Warehouse → Clean the cache Then restart the phone.
- 📥 Refuse the module DRM (for advanced users: 1. Unlock bootloader. 2. Install TWRP. 3.Sweep the zip file from Widevine L1 For your model (see for your model) 4PDA). ⚠️ Attention: Wrong firmware DRM This can lead to loss of warranty and blocking. IMEI. Do this only if you understand the risks!
- 🛠️ Reset Google Play Services: Settings → Annexes → All applications → Google Play Services → Three points. → Remove updates
5. Damaged files or download errors
Sometimes the problem isn't with the phone, it's with the video file itself.
- 📥 The file has not been downloaded completely (connection break).
- 🔍 Video damaged when copied from PC or flash drive.
- 📁 The file has incorrect metadata (e.g. broken subtitles).
How to check the integrity of the file:
- Compare the file size to the original (if downloaded from the Internet).
- Try opening the video on another device (PC, tablet).
- Use VLC on PC – it will show playback errors in logs (Tools → Messages).
Decisions:
- 🔄 Download the file (if the problem is downloading).
- 🛠️ Restore the video with the help of MP4 Repair (Android) or HandBrake (PC).
- 📂 Check the file system: Settings → Memory. → Three points. → Verification and cleaning → Check for errors
☑️ Checking the file before complaining about the phone
6 Conflicts with MIUI applications and settings
MIUI is known for its aggressive resource management, sometimes simply killing the player in the background or blocking access to files, and conflicts can arise from:
- 🔒 Application authorizations (MIUI block access to folders).
- 📵 Battery optimization (player can't work in the background).
- 🛡️ Antivirus or Clean Master (deletes "unnecessary" codec files).
Decisions:
- Give all permissions to the player: Settings → Annexes → Application management → [Your record player] → Permits → Turn it on.
- Disable Battery Optimization: Settings → Battery → Battery Optimization → Find a Player → Disable
- Delete the cleaners: Applications like Clean Master, DU Speed Booster, and the likes of the DU Speed Booster often delete important codec files.
- Reset application settings: Settings → Applications → Application management → Three points → Reset application settings
7. Hardware problems: when the "iron" is to blame
If none of the above methods worked, the problem could be in the hardware:
- 💾 Damaged flash memory (bad blocks).
- 📱 Display module malfunction (video is available but not displayed).
- 🔌 Memory controller problems (phone doesn't see files).
How to diagnose:
- Check the memory for bad blocks: 1. Install A1 SD Bench. 2. Run the read/write test. 3. If the speed drops to 0 MB/s, there are damaged sectors.
- Connect your phone to your TV via HDMI (through a USB-C to HDMI adapter), and if the video is on a TV screen but not on your phone, it's the display module that's to blame.
- Listen to the sound: if you hear clicks or cracks from the speaker during playback, the problem is in the audio codec.
Decisions:
- 🛠️ Replace flash memory (only in the service center).
- 📺 Use your phone as a media server (e.g., through Kodi on Fire) TV Stick).
- 📱 Take to the service for diagnosis of the memory controller or display.
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If the phone falls or reboots when trying to open the video, it may indicate memory problems or overheating of the processor. Check the temperature via AIDA64 - if the CPU is above 70°C, cleaning or replacing the thermal paste is required.