A timestamp (<x id="START_ITALIC_TEXT" ctype="x-i" equiv-text="<i>"/>00:05<x id="CLOSE_ITALIC_TEXT" ctype="x-i" equiv-text="</i>"/> for example) is automatically converted into a link to a part of the video.
Some of your channels are not fully set up. Make them welcoming and explicit about what you publish by adding a <x id="START_TAG_STRONG" ctype="x-strong" equiv-text="<strong>"/>banner<x id="CLOSE_TAG_STRONG" ctype="x-strong" equiv-text="</strong>"/>, an <x id="START_TAG_STRONG" ctype="x-strong" equiv-text="<strong>"/>avatar<x id="CLOSE_TAG_STRONG" ctype="x-strong" equiv-text="</strong>"/> and a <x id="START_TAG_STRONG" ctype="x-strong" equiv-text="<strong>"/>description<x id="CLOSE_TAG_STRONG" ctype="x-strong" equiv-text="</strong>"/>.