https://commons.m.wikimedia.org/wiki/Special:MediaSearch?search=&type=video
I noticed a large amount of errors from ES5 browser (> 100 a day)
It's not an ES6 browser, so you might want to consider dropping support for ES5 browsers in the search experience using the new ES6 ResourceLoader module support that @Catrope introduced.
https://logstash.wikimedia.org/goto/a8c100294e507e87896bfeede6c1a454
resources/lib/vue/vue.common.prod.js
undefined is not a function
at module.exports.mounted URL1:486:835 at He <anonymous>:370:244 at Yt <anonymous>:384:197 at Object.jt.insert <anonymous>:379:221 at k <anonymous>:419:754 at wn.zi.nodeOps [as __patch__] <anonymous>:421:112 at wn.e._update <anonymous>:393:412 at wn.r <anonymous>:427:736 at fn.get <anonymous>:385:628 at new fn <anonymous>:385:546 URL1: https://commons.m.wikimedia.org/w/load.php?lang=en&modules=jquery%2Coojs-ui-core%2Coojs-ui-widgets%7Cmobile.init%7Cskins.minerva.scripts%7Cwikibase.mediainfo.mediasearch.vue%7Cwikibase.mediainfo.search&skin=minerva&version=xd0jf