I guess. An average 30 sec video in Tiktok is around 10mb. So with a S3 storage. For a monthly budget of 10€, you could roughly store 500k of those videos. Taking also account the server bills (10-20€) That would be 30€ per month. For a million of those videos would be 20€ so monthly around 50€ euros. For people that really want to host one. I guess you could. But it’s definitely more expensive than something like Lemmy.