<span class="peertube-plugin-livechat-warning"> You have enabled the setting «Users can activate the chat for their lives». It is redundant with the «Activate chat for all lives» setting. </span>
You can choose from several different sets the default avatars that will be used for chat users. Please refer to the documentation: <a href="https://livingston.frama.io/peertube-plugin-livechat/documentation/admin/settings/" target="_blank">Settings</a>.