If the file won't open at all, it may have been interrupted during download or transfer.
If you are preparing this video for a professional or public setting, following WCAG accessibility standards is recommended: Ajb07027 mp4
If the video has sound but no picture (or vice versa), the file might use a specific codec (like H.265) that your player doesn't support. Try using a versatile player like VLC Media Player . If the file won't open at all, it
To provide a helpful write-up, I wouldHowever, if you are looking to manage, share, or ensure this video is accessible, 1. General File Information if you are looking to manage