Basic video player allow you to select a video file from your local folder or Computer

Most modern browsers support the MP4, AVI, and WebM video formats, but support for MKV format may vary. Here's a summary of which video formats are supported by common browsers:
MP4: Supported by all major browsers, including Chrome, Firefox, Safari, and Edge.
AVI: Supported by some browsers, but not all. For example, Chrome and Firefox support AVI, but Safari does not.
MKV: Support for MKV format is limited and may vary among browsers. Chrome and Firefox support MKV, but Safari does not.
WebM: Supported by Chrome, Firefox, and Opera.
When creating a video player, it's a good practice to provide multiple video formats to ensure compatibility with different browsers. For example, you could provide both MP4 and WebM versions of your video and use JavaScript to detect the browser and choose the appropriate format.
Here's an example of how you can add support for multiple video formats in your player: