Open this url https://openfde.com/intro.mp4 and firefox shows "video can't be player because this file is corrupt".
Web Console logs:
```
Media resource https://openfde.… (ďalšie informácie)
Open this url https://openfde.com/intro.mp4 and firefox shows "video can't be player because this file is corrupt".
Web Console logs:
```
Media resource https://openfde.com/intro.mp4 could not be decoded. intro.mp4
Media resource https://openfde.com/intro.mp4 could not be decoded, error: Error Code: NS_ERROR_DOM_MEDIA_DECODE_ERR (0x806e0004)
Details: void mozilla::AppleVTDecoder::OnDecodeError(OSStatus): OnDecodeError:ffffcd9a intro.mp4
```
`ffmpeg -i` with this video file:
```
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/path/to/intro.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.76.100
Duration: 00:01:51.77, start: 0.000000, bitrate: 3243 kb/s
Stream #0:0[0x1](eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(progressive), 4096x2304 [SAR 1:1 DAR 16:9], 3109 kb/s, 25 fps, 25 tbr, 12800 tbn (default)
Metadata:
handler_name : ?Mainconcept Video Media Handler
vendor_id : [0][0][0][0]
Stream #0:1[0x2](eng): Audio: mp3 (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
handler_name : #Mainconcept MP4 Sound Media Handler
vendor_id : [0][0][0][0]
```
Chrome is fine.