Changes

var source = $('<source>').attr('type', 'video/' + ext);

var source = $('<source>').attr('type', 'video/' + ext);

for (var attr in $(this).data()) {

for (var attr in $(this).data()) {

;(attr === 'src' || attr === 'type' ? source : video).attr(attr, (attr === 'src' ? 'https://en.kancollewiki.net/Special:Filepath/' : '') + $(this).data(attr));

var el = attr === 'src' || attr === 'type' ? source : video;

el.attr(attr, (attr === 'src' ? 'https://en.kancollewiki.net/Special:Filepath/' : '') + $(this).data(attr));

}

}

video.append(source);

video.append(source);