Why can one MP4 play while another cannot?
MP4 can contain different codecs. H.264 with AAC is widely supported; other combinations may need local preparation.
Play MP4 videos in your browser with subtitles, speed controls, playlists and screenshots.
Drop video files here
Local files
Enter a direct video, HLS playlist or FLV stream address.
For a local M3U8 with relative paths, enter the directory URL containing its media files.
How to use this player
- Add a local video, or open its direct video URL.
- MP4 can contain different codecs. H.264 with AAC is widely supported; other combinations may need local preparation.
- Add SRT/VTT subtitles if needed, adjust their offset, and take a screenshot of the frame you want.
Add local videos or open a direct link. Adjust playback, repeat a section, and inspect available audio and subtitle tracks.
Frequently asked questions
Does playing MP4 change my file?
No. Direct playback uses the original file; any compatible version is temporary and leaves the source unchanged.
Are my local videos uploaded?
Local files are played and processed on your device. Links connect directly to the source you enter.
Why does a video need preparation before playing?
A file’s extension does not identify its codecs. If your browser cannot play them directly, the player prepares a compatible version locally.
Can every live stream rewind or record?
Rewind depends on the time window provided by the source. Recording depends on source access and browser support, and records the playback you watch.
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