Video missing support error handling.

videoSupportHandling.js

const video = document.querySelector('video');
video.addEventListener('error', () => {
    switch (video.error.code) {
        case video.error.MEDIA_ERR_DECODE:
        case video.error.MEDIA_ERR_SRC_NOT_SUPPORTED:
            // Video format not supported.
            break;
        case video.error.MEDIA_ERR_ABORTED:
        case video.error.MEDIA_ERR_NETWORK:
        default:
            // Any other errors, handle this differently.
    }
});