Nobody pays for that much bandwidth without the ability to manipulate you through profiling and impressions. You are the product. The product is not sharing videos. There is no fediverse platform that makes you its whore. If you were to make a video sharing platform, it would never work, because that is not the product, it's only a feature of what makes up the dopamine machine.
Lemmy will also never outgrow commercial platforms, because the commercial platforms also never were about content.