An email will be sent to <x id="START_EMPHASISED_TEXT" ctype="x-em" equiv-text="<em>"/><x id="INTERPOLATION" equiv-text="{{ registration.email }}"/><x id="CLOSE_EMPHASISED_TEXT" ctype="x-em" equiv-text="</em>"/> explaining its registration request has been <x id="START_TAG_STRONG" ctype="x-strong" equiv-text="<strong>"/>rejected<x id="CLOSE_TAG_STRONG" ctype="x-strong" equiv-text="</strong>"/> with the moderation response you'll write below.
An HTTP request has to be sent on each tracker for each video to spy. If we want to spy all PeerTube's videos, we have to send as many requests as there are videos (so potentially a lot)