function streamtube_child_enqueue_modified_videojs(){
    wp_deregister_script( 'videojs' );

    wp_enqueue_script(
        'videojs',
        get_theme_file_uri( 'assets/video.min.js' ),
        array(),
        filemtime( get_theme_file_path( 'assets/video.min.js' ) ),
        true
    );
}

add_action( 'wp_enqueue_scripts', 'streamtube_child_enqueue_modified_videojs' );
add_action( 'enqueue_embed_scripts', 'streamtube_child_enqueue_modified_videojs' );