Can we help webmasters of piped/invidious instances display their message of the day?

[mk-pmb]

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Question

For some alternative frontends like piped/invidious, we currently just transform it to the original site's extractor (YouTube in this case). That's a good approach. Nonetheless, I'd like a way for those webmasters to still convey their message of the day, often a request for funding. What would be a good way to do that? Should we just check for an HTML element with class="ytdl-motd" and try to display its text in a console-appropriate way above the download progress? Is there a more standardized way for labeling such kinds of messages? (For maximum compatibility with other kinds of alternative frontends.)

Or maybe we should check for a potential text file like /meta/motd.txt? That way webmasters could craft a message specific to console clients, potentially even specific to the user agent. In case of HTTP 404 the reply could be much shorter and cheaper to render server-side, than the usual HTML page.