> What you’re describing with QuickTime was a proprietary nightmare that didn’t even work correctly across Apple products, let alone Microsoft or Linux.

This is such a deep misunderstanding of QuickTime that it's hard to know where to begin. QuickTime supported standards whenever possible, but you must know that QuickTime pioneered digital video and audio before open media standards were ubiquitous, and was in fact the blueprint (sometimes literally, see https://en.wikipedia.org/wiki/ISO_base_media_file_format) for today's standards. As a top-level history lesson, do yourself a favor and ask your favorite LLM, "What technology standards did QuickTime use and inspire?"