SO: “that’s a stupid question!” GPT: “that’s a great question!”

It’s way better than a web app! it ships with a separate browser the user has zero control over and with more permissions to abuse. /s

At this point that’s almost like ransomware.

avc1 is the name for H.264 (also called AVC) which is admittedly pretty confusing

MP4box has a great local web tool to test the mime type including the codecs parameter:

https://gpac.github.io/mp4box.js/test/filereader.html

Jake Archibald wrote a good article about this topic: https://jakearchibald.com/2022/html-codecs-parameter-for-av1/