Thanks for choosing our product!
We have just checked your site and see have conflict with mediaelement.js on your site:
We made hot fix and now almost page working fine.
Only single video page with Selfhost source have issue conflict with this code: https://prnt.sc/v60h1j
We need to find plugin our theme cause the issue.
We’ll reply to you if have something new.
After checking your site we found the issue from this plugin: Asset CleanUp: Page Speed Booster
it will make extra JS loading: https://prnt.sc/v6he1x https://prnt.sc/v6he72
So in this case the solution is deactivate this plugin and clear cache of your site. We checked by deactivate this plugin but it still load old js file, that’s seem cached from your server.
There is no conflict between our plugin and Porto theme.
Hope this helps!