Twitter initially didn't support video, but you could embed YouTube videos within a tweet simply by posting a link to a YouTube video. Sure, you needed a separate account for uploading the video to YouTube, but most people don't post videos anyway.
So if Bluesky ships video support within the next two decades, they'll be fine. Or more likely, HN will just move on to the next thing to complain about.
Don't be dense. Twitter could get away with no video because they weren't competing with an established alternative that already supported video.
I really don't think not having native video support is a deal breaker for many people. As I said, most people on X (Twitter) don't post videos anyway. Moreover, it's not clear whether the added moderation and server cost is worth it.
Twitter didn't exist two decades ago. Twitter didn't get videos until almost 10 years after it was created