How exactly do you envision this ? you will ask the ai to make youtube but better, people seperate the "what" from the "how" but they have a very complex relationship
Replace "vibe coding" with "outsource to India" and it's the same situation we were in 20 years ago: I remember around the time when YouTube had well-established itself (2009-ish?) and so a cottage-industry mushroomed all selling visual-lookalike YouTube clones, but implemented as monolithic single PHP project or WordPress plugin, using the local filesystem for video file storage (or worse: Base64-encoded text in MySQL, lovely).
...to someone with no prior experience or knowledge how highly-scalable, Google-tier web applications (like the real YouTube) work or are built, these "Me-Too-Tube" sites were indistinguishable from the real thing and as far as they were concerned they were happy with it.
Never mind that even if those $25 scripted websites were ever actually scalable, it isn't enough to simply have a video-sharing site; you need to get millions of people to decide to start using it - and that's something which will elude Claude's abilities... possibly forever, I feel.