While load times and sizes are something caring developers would be very worried about, I feel giving a warning for it outside of devtools would flag a lot of false positives on any site that embedded videos of any meaningful length. And as far as annoying the user, javascript can do far more damage in a lot less bytes. And less data modes are possible iirc.
Either way, if you update your site I’d be very excited to see whatever you come up with :D
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While load times and sizes are something caring developers would be very worried about, I feel giving a warning for it outside of devtools would flag a lot of false positives on any site that embedded videos of any meaningful length. And as far as annoying the user, javascript can do far more damage in a lot less bytes. And less data modes are possible iirc.
Either way, if you update your site I’d be very excited to see whatever you come up with :D