Is there a way to assign an alternate host to a webinar?

No.  This is referring to the Webinars, not regular meetings.  I was told that you could not schedule webinars on behalf of others.  I know we can for meetings but not webinars.  Was I told incorrectly?

Please add alternative hosts to Meetings. If the host is out sick, alternative hosts can start the meeting. This is not the same feature as scheduling on behalf of someone.