I guess that's because the player doesn't support, (ultimately), h265 (HEVC) codec. Encoding it to h264 (AVC) might work:
```
ffmpeg -i "file.mp4" -strict 2 -vcodec libx264 -pix_fmt yuv420p -preset slow -acodec aac output.mp4
```
For low-end machines (computer) with very low RAM, replace `slow` with `ultrafast`.
Note: this would take many hours.
Comments - 5
kuddlesworth
harieamjari
leach9001
wavesarecoming (uploader)
wavesarecoming (uploader)