See the <x id="START_LINK" ctype="x-a" equiv-text="<a target="_blank" href="https://docs.joinpeertube.org/#/use-library?id=playlist">"/>documentation<x id="CLOSE_LINK" ctype="x-a" equiv-text="</a> "/> for more information.
The video quota only takes into account the size of <x id="START_TAG_STRONG" ctype="x-strong" equiv-text="<strong>"/>uploaded<x id="CLOSE_TAG_STRONG" ctype="x-strong" equiv-text="</strong>"/> videos, not transcoded files or user export archives (which may contain video files).