add the state-of-the-onion requirement and alternatives

howto/conference.md

@@ -68,6 +68,8 @@ page.
  * usable to host a Tor meeting, which means more load (because
    possibly > 20 people) and more tools (like slide sharing or
    whiteboarding)
+ * multi-party lightning talks, with ways to "pass the mic" across
+   different users (currently done with Streamyard and Youtube)
  * respecting our privacy, peer to peer encryption or at least
    encrypted with keys we control
  * free and open source software
@@ -312,3 +314,7 @@ Conference-hosting and larger-scale e-learning software:
  * [OpenCast](https://opencast.org/) - for hosting classes, editing,
    less interactive
  * [Venueless](https://venueless.org/) - BSL, specialized in hosting conferences
+ * [Voctomix](https://github.com/voc/voctomix) and [vogol](https://salsa.debian.org/debconf-video-team/vogol) are used by the Debian video team to
+   stream conferences online. requires hosting and managing our own
+   services, although Carl Karsten @ https://nextdayvideo.com/ can
+   provide that paid service.