You tried to open an iPhone video or photo on Windows, and instead of the picture you got a prompt: you need "HEVC Video Extensions" from the Microsoft Store, for $0.99. Paying for something that sounds like it should be built in can feel like a scam. It isn't - but depending on what you want to do, you might not need it at all.
#What HEVC is, in one paragraph
HEVC, also called H.265, is a way of compressing video. It makes files about 40% smaller than the older H.264 at the same quality, which is why iPhones have used it by default since 2017 (it's what the camera's "High Efficiency" setting means), along with most recent Android phones, GoPros and drones. iPhone photos use it too: a .heic photo is a still image compressed with HEVC. H.264 vs H.265 explains how the two relate.
#Why Windows doesn't include it
HEVC is covered by patents held by many companies, gathered into several competing licensing pools, and anyone who ships a decoder owes royalties. Rather than pay for every copy of Windows - most of which will never play an HEVC file - Microsoft sells the decoder separately and passes the cost on. That applies to Windows 11 as much as Windows 10: a fresh copy of either doesn't include it.
Plenty of people already have it without knowing, though. PC makers often preinstall a free version called "HEVC Video Extensions from Device Manufacturer". Before buying anything, open Settings → Apps → Installed apps (Apps & features on Windows 10) and search for "HEVC". If it's listed, you're done.
#What it actually does
The extension adds HEVC support to Windows itself, so every app that relies on Windows for video can open HEVC files:
- Photos, Media Player and Movies & TV play iPhone videos instead of showing a black picture or error 0xc00d5212.
- iPhone photos (.heic) open. They need two pieces: Microsoft's free HEIF Image Extensions reads the photo file, and HEVC Video Extensions decodes the image inside it.
- File Explorer thumbnails appear, so iPhone videos stop showing as blank icons.
- Other apps that use Windows for playback gain HEVC too - the Netflix app, for example, needs it for 4K streaming.
It uses your graphics hardware when it can. Microsoft's description says it's designed for newer devices, such as those with an Intel 7th-generation Core processor or a newer graphics card, to handle 4K, and falls back to software decoding on older machines, where playback "might vary" with the resolution and the PC's performance. In practice, 4K HEVC on an older laptop without hardware support can stutter.
Do you need it?
Check Installed apps first - your PC maker may have included the free version.
VLC carries its own HEVC decoder. H.264 plays on every Windows PC with nothing installed.
#Is it safe?
Yes, as long as it comes from the Microsoft Store and the publisher is listed as Microsoft Corporation. It's an official Microsoft product, not a third-party codec. The risk is elsewhere: websites offering a "free HEVC codec" download, or installers bundled with other software. Those aren't from Microsoft, and you can't tell what else they install. Get it through the Store app itself.
#Is it a one-time payment?
Yes. It's a single $0.99 purchase (the price varies a little by country), not a subscription. It's tied to your Microsoft account, so you can reinstall it later, or on another PC you sign in to, without paying again.
#Is there a free version?
Technically, yes: "HEVC Video Extensions from Device Manufacturer" is the same software, free, and intended for PC makers to preinstall. For a while you could install it yourself through a direct Microsoft Store link. That route no longer works reliably. The methods still circulating involve downloading an old installer package from an archive site and installing it with an administrator command, and even then it doesn't work on every PC or with newer versions of Media Player. Saving 99 cents isn't worth installing system software from an unofficial source.
#Do you actually need it?
- You just want to watch the videos: no. VLC (free) has its own HEVC decoder and plays iPhone videos without any extension.
- You want Photos, Media Player, thumbnails or .heic photos to work: yes. Buy it, or check whether you already have the free manufacturer version.
- You're sending videos to other people: don't make them buy anything - send H.264 instead. On an iPhone, Settings → Camera → Formats → Most Compatible records in H.264 (files are bigger, and 4K at 60 fps needs High Efficiency). For videos you already have, re-encode the HEVC to H.264: in Wave, drop the file and turn on Make it play everywhere; HandBrake (free) does the same on a desktop.
#The other video extensions
HEVC is the only one of Microsoft's format extensions that costs money. The rest are free:
Windows' format extensions at a glance
| Extension | Price | What it adds |
|---|---|---|
| HEVC Video Extensions | $0.99 | HEVC (H.265): iPhone and most phone videos, .heic photos |
| AV1 Video Extension | Free | AV1: newer web video and some screen recordings |
| VP9 Video Extensions | Free | VP9: much of YouTube and other web video |
| HEIF Image Extensions | Free | .heic and .heif photos (needs the HEVC extension too) |
| MPEG-2 Video Extension | Free | MPEG-1 and MPEG-2: DVDs, older camcorder and TV recordings |
#The takeaway
HEVC Video Extensions is a genuine Microsoft product that costs $0.99 once, because of patent royalties on the HEVC format. Neither Windows 10 nor Windows 11 includes it unless your PC maker added the free version. If you only need to watch the videos, VLC does it for free. If you want Windows' own apps, thumbnails and iPhone photos to work, the 99 cents is worth it. And if you're sending videos to other people, H.264 avoids the question entirely.