What Is a WEBM File?
WEBM is an open, royalty-free video container format created by Google in 2010. It's designed specifically for the web — optimized for streaming, small file sizes, and broad browser support. When you download a video from YouTube, Reddit, Twitter/X, Discord, or most modern websites, there's a good chance it arrives as a WEBM file.
Inside a WEBM container, you'll find:
- Video codec: VP8 (older), VP9 (common), or AV1 (newest, best compression)
- Audio codec: Vorbis (older) or Opus (newer, better quality at low bitrates)
WEBM is essentially the video equivalent of WEBP for images — Google's push for open, efficient web media formats.
Playing WEBM on Android
Android has supported WEBM playback natively since Android 4.0 (2011). Every modern Android device can play WEBM files without any special app or codec pack. AnExplorer opens WEBM files directly:
- Navigate to the WEBM file in AnExplorer
- Tap the file
- Video plays in the built-in player or your default video app
Codec support by Android version:
- VP8: Android 4.0+ (all modern devices)
- VP9: Android 4.4+ (virtually all devices in use today)
- AV1: Android 10+ (hardware decode on newer chips like Snapdragon 8 Gen 1+, Dimensity 9000+, Tensor G2+)
For older devices without AV1 hardware decode, VLC for Android provides software decoding.
Where WEBM Files Come From
You'll encounter WEBM files from:
YouTube downloads: Most YouTube downloader tools save in WEBM format (especially for higher resolutions like 1080p and 4K where VP9/AV1 is used).
Reddit and social media: Reddit's video player uses WEBM. Downloaded Reddit videos are typically WEBM with Opus audio.
Discord: Videos shared in Discord channels are often WEBM, especially screen recordings and GIFs-as-video.
Screen recordings: Some Android screen recorders output WEBM for smaller file sizes.
Web downloads: Any "Save video" from a modern website likely produces a WEBM file.
Managing WEBM Files with AnExplorer
AnExplorer provides full management for WEBM video files:
Browse and organize:
- View WEBM files with video thumbnails in grid view
- Sort by size, date, or name
- Move between folders, rename, or delete
- Copy to NAS, cloud, or external storage
Play directly:
- Tap to play with built-in player
- Or launch in VLC, MX Player, or any installed video app
- Supports subtitles if a matching .srt file exists
Transfer:
- Send WEBM files to PC via Device Connect
- Upload to Google Drive, Dropbox, or other cloud services
- Copy to NAS via SMB for media library storage
Archive:
- Compress multiple WEBM files into ZIP/7z for sharing
- Extract WEBM from downloaded archives
WEBM vs MP4 — When to Use Each
| Aspect | WEBM (VP9/AV1) | MP4 (H.264/H.265) |
|---|---|---|
| File size | Smaller (10-30% less at same quality) | Larger |
| Quality | Excellent | Excellent |
| Android support | ✅ Native | ✅ Native |
| iOS/Apple support | Limited (Safari only) | ✅ Universal |
| Web browser support | ✅ All modern browsers | ✅ All browsers |
| Hardware decode | VP9: most devices; AV1: newer only | H.264: all; H.265: most |
| Editing software | Limited support | Universal support |
Bottom line: For playback on Android, both formats work perfectly. WEBM is smaller. MP4 is more universally compatible if you need to share with iPhone users or edit in desktop software.
WEBM on Different Android Devices
Phones and tablets: All modern Android phones play WEBM natively. AnExplorer's built-in player handles it without issues.
Android TV: WEBM plays on all Android TV devices. Nvidia Shield, Chromecast with Google TV, and Fire TV all have VP9 hardware decode. AV1 hardware decode is available on newer devices (2022+).
Chromebook: ChromeOS has excellent WEBM support (Google's own format). AnExplorer on Chromebook plays WEBM files smoothly.
Wear OS / VR: WEBM playback works but these devices are better suited for shorter clips due to screen size and battery constraints.
Troubleshooting WEBM Playback
"Can't play this video" error:
- The file may use AV1 codec on a device without hardware decode
- Solution: Install VLC for Android (software decodes all codecs)
No audio in WEBM file:
- Some YouTube downloads separate video and audio tracks
- The WEBM may be video-only (check file size — very small = no audio)
- Re-download with a tool that merges audio and video
WEBM file won't open:
- File may be corrupted (incomplete download)
- Try re-downloading the file
- Check file size — a 0 KB file indicates a failed download
WEBM File Sizes — What to Expect
Typical WEBM file sizes for common content:
| Content | Duration | Resolution | Typical size |
|---|---|---|---|
| YouTube clip | 5 min | 1080p VP9 | 50-100 MB |
| YouTube clip | 5 min | 4K VP9 | 150-300 MB |
| Reddit video | 30 sec | 720p | 5-15 MB |
| Discord clip | 1 min | 1080p | 10-30 MB |
| Screen recording | 10 min | 1080p | 80-200 MB |
WEBM files are generally 20-30% smaller than equivalent MP4 files at the same quality, which is why websites prefer serving them.
Related Guides
- Open MP4 Files on Android — the other common video format
- Open MKV Files on Android — container format for movies
- Video Player — AnExplorer's built-in video playback
- Transfer Android to PC — send videos to your computer
