Administrators have full control of the content they accept and they decide whether sensitive content (violence, pornography etc.) is displayed by default or not.
<a target="_blank" rel="noopener noreferrer" href="https://docs.joinpeertube.org/use/create-upload-video#upload-a-new-version-of-a-video">Upload a new version of the video</a> if your administrator enabled this setting
Bandwidth: can be mitigated using <a target="_blank" rel="noopener noreferrer" href="https://docs.joinpeertube.org/admin/following-instances#instances-redundancy">PeerTube redundancy system</a> and cache servers that serve video static files in front of your PeerTube instance