Why video in Yandex slows down on Xiaomi Redmi 9: a full analysis of problems and solutions

You try to watch a video in Yandex.Browser, Yandex.Ether or another Yandex service on your Xiaomi Redmi 9, but the video is constantly slowing down, “hanging” or jerking? The problem is familiar to many owners of this budget smartphone – despite the good characteristics (Helio). G80, 4 GB of RAM, video from Yandex often performs worse than other applications. In this article, we will examine all possible causes - from overheating of the processor to conflicts of codecs in the Internet. MIUI, We also provide step-by-step instructions for removing lags.

It’s important to understand that video braking is always a complex problem, and it can be associated with hardware limitations (Redmi 9 is not the most powerful phone for Full). HD-content) and software bugs (e.g., unoptimized codecs in firmware or background processes that devour resources). 4PDA, Mi Community and Xiaomi technical documents to highlight the most common scenarios and work solutions.

1. hardware limitations Xiaomi Redmi 9: why the hardware does not pull the video

Even if your Redmi 9 is new and clean, its MediaTek Helio processor is a good choice. G80 video accelerator Mali-G52 They don't always do well with modern video formats, and you can see this when you watch it:

• 🎥 Video in resolution 1080p60 (Full HD 60-frame)
• 🎬 Codec rollers VP9 or AV1 (Used in YouTube and Yandex.Ether to save traffic)
• 🔥 Content with high bitrate (more than 8 Mbit / s)

The problem is compounded by the fact that MIUI It activates energy-saving settings by default that limit processor performance, such as when the battery is low (≤20%) the system automatically reduces the clock frequency of Helio G80, Which leads to a snag in reproduction.

How do you check if you have enough power? Install the app CPU The Throttling Test from Google Play, which will show you if the system is restricting performance, if you see the results say "Throttling detected," it means that you're not going to be able to get a performance limit, MIUI artificially strangles the processor.

⚠️ Warning: If the Redmi 9 body temperature exceeds 45°C (can be checked in Settings) → Battery → Temperature, the processor automatically reduces the frequency to 1.2 GHz. This causes lags even in the processor. 720p-video.

2.Problems with codecs and format support in MIUI

One of the most insidious reasons for the brakes is the lack of hardware acceleration for some video formats. G80 Redmi 9 does not support hardware decoding VP9 and AV1 It's iron. It means that:

• 🔄 Videos with these codecs are decoded programmatically (via CPU), Not through video accelerator.
• 🐢 Resource costs grow by 3-5 times, which leads to jerks and overheating.
• 📉 Battery goes down faster (up to 15-20% per hour of viewing).

How do you know what codec is used in a video? In Yandex.Browser, open the video, click on three dots. → Statistics: If the Codec line says vp09 (it VP9) or av01 (AV1), That's the problem.

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To force the hardware acceleration to be activated H.264 (The most common codec, install the application MX Player and in the decoder settings select "HW+".

3. Background processes and optimization MIUI: plunderer?

MIUI It's known for its aggressive optimization of background processes, but sometimes it works too hard:

• 🚫 Nail Yandex.Browser or Yandex.Ether when folding, resetting the video buffer.
• 🔄 Limiting applications’ access to the internet in the background (this causes video uploads to “snap»).
• 📱 Run unnecessary services (such as mipush or msa) that load the processor.

How to clean up background processes?

1. Open Settings → Applications → Application Management.
2. Find Yandex.Browser (or another player) and select Battery → No restrictions.
3. Enable AutoRun and Background Activity for this application.
4. Go to Settings. → Special facilities → Optimization MIUI and turn off background restriction.

Turn off auto-cleaning RAM|Add a player to battery exclusion|Turn off background optimization|Remove unnecessary system applications-->

Also check your RAM usage: if less than 500MB is free, the system will start to “hang” to free up memory, install Greenify and “freeze” unnecessary applications (for example, Mi Video, GetApps, Mi Browser).

Settings Yandex.Browser and Yandex.Ether: what prevents reproduction

Often the problem lies not in the phone, but in the settings of the Yandex apps themselves.

• 🔊 Economic mode enabled in Yandex.Browser (reduces video quality to the level of the browser) 480p, but sometimes causes artifacts).

How to configure Yandex.Browser for smooth video:

1. Open the browser, click on three dots. → Settings → Save traffic and disable Saving mode.
2. In the same menu, select the quality of the video. → Always. HD (If your tariff allows you).
3. Go to Settings. → Additionally. → Hardware acceleration and turn on this option.

For Yandex.Ether:

1. Go in profile. → Settings → Video quality.
2. Select a fixed resolution (720p car).
3. Turn off traffic savings and adaptive quality.

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If the video is slowed only in the browser, and in the YouTube app or VLC All right, the problem is exactly in the settings of Yandex, not the phone.

5. Internet connection problems: Wi-Fi vs mobile traffic

Even if you have fast internet, an unstable connection can cause jerks when playing, especially for Redmi 9, which has a weak Wi-Fi module (Wi-Fi 5 (802.11ac) Just check it out:

• 📶 Download speed: if it is below 10 Mbps, video in 1080p will slow down.
• 🔄 Ping to Yandex servers: if it is above 100 ms, there will be lags.
• 🔌 Connection type: Redmi 9 doesn't work well with 5GHz networks long distance from router.

How to diagnose the problem:

1. Install Speedtest and check the speed on the Yandex server (Moscow).
2. If the speed is low, reconnect to the 2.4GHz network (it is more stable, albeit slower).
3. Turn it off. IPv6 Wi-Fi settings (sometimes it conflicts with Yandex servers).

If you are using mobile internet, make sure that:

• 📡 In the settings SIM-card enabled Mode 4G (LTE), not 3G.
• 📵 Traffic Saving Mode Disabled in Settings → SIM-maps and mobile networks.
• 🔄 In Yandex.Browser disabled the option of Data compression (it can spoil the video stream).

6.Overheating and trottling: why the phone 'strangles' video when heated

Xiaomi Redmi 9 is prone to overheating due to its compact body and weak cooling system.At temperatures above 43°C triggers trottling, which is a forced performance reduction to avoid chip damage:

• 🔥 Dramatic falls FPS in video (from 60 to 20-30 frames).
• 📉 «Sitting down the processor to 1.0-1.2 GHz (instead of the standard 2.0 GHz).
• ⚡ Instant battery discharge (up to 1% per minute).

How to deal with overheating:

• 🧊 Remove the case (especially silicone) - it worsens the heat sink.
• 🌡️ Do not use your phone while charging (this increases heating by 10-15)°C).
• 🔄 Install Coolify app (root required) for forced cooling.
• 📴 Close all background apps (especially games and instant messengers).

To check the temperature in real time, set the temperature. AIDA64 Enter the code in the engineering menu:

##4636##

In the Battery Information section, see Temperature. If it's above 45.°C, the video will be slowed down.

⚠️ Warning: If the temperature is above 50°C, stop using your phone immediately! Prolonged overheating can damage the battery and motherboard.In this case, it is recommended to turn off the device for 30-40 minutes.

7.Outdated firmware or bugs MIUI: When it's soft

If the video in Yandex was slowed not always, but began to lay after the update MIUI, The problem is probably the firmware. MIUI 12.5-14 Redmi 9 bugs were detected:

• 🐛 Codec conflict VP9 in Yandex.Browser (corrected to the MIUI 13.0.4).
• 🔄 «Hanging up when switching between Wi-Fi and mobile internet.
• 📥 Video buffering errors due to a bug in MediaCodec.

How to update the firmware correctly:

1. Go to Settings → About the phone → System update.
2. If a new version is available, download it and install it.
3. If there are no updates, check the version. MIUI In Settings → The phone. → Version. MIUI.
4. For manual firmware, download the latest stable version from the Mi Community website (select Redmi 9/Global).

If the problem persists after the update, try to roll back to the previous version or install custom firmware (such as Pixel Experience or LineageOS).

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Before updating the firmware, make a backup of the data through Settings → Additionally. → Backup. Update 10% of the time MIUI lead to resetting.

8. Alternative solutions: if nothing helps

If you have tried all of the above methods, but the video in Yandex still slows down, try radical measures:

• 🔄 Reset to factory settings (will delete all data, but solve software problems).
• 📱 Use of alternative players (e.g, VLC or MX Player with hardware acceleration).
• 🔧 Shutdown MIUI Optimizations (requires) ADB):

adb shell settings put global hidden_api_policy 1

This team turns off aggressive optimization MIUI, It can reduce battery life.

If that doesn’t work, there may be a problem with the hardware defect:

• 🔋 Worn-out battery (if capacity is below 80%, the phone limits performance).
• 🔌 Faulty module Wi-Fi/4G (check on another device).
• 🖥️ Damage to the motherboard (for example, after falling or getting moisture).

In this case, the only way out is to contact the service center. The average cost of diagnosis in official Xiaomi services is 500-1000. ₽.

FAQ: Frequent questions about brakes videos on Redmi 9