
Copyrights (If you’re using content of someone else they can get your video removed).Community Guidelines (uploading soft p0rn, p0rn or any hardc0re 18+ content will get your video removed) and.Video can only be removed from your channel if it’s violating the conditions of YouTube. So far it does seem like "forever" is the practice, rather than there being some time limit. That said, there have also not been any complaints from people about content being deleted because it is old, without some other stated reason (like discovering copyright infringement in that video years after it was posted).

It does not promise perpetual and constant access to videos you have uploaded, whether public or private. YouTube explicitly says it is not a archival service.
