Nearly any topic that Todd Williams writes about or speaks on, he can do a webinar. You can find some of his "uni-directional" webinars on ProjectManagement.com (see partial listing below) or you can have a fully interactive session as in the audio clip.  The limitations of the session are based on the tool used. In this example, the ZOOM meeting tool was used and it did not allow recording of the video. The session was recorded on May 29, 2019 at 12:30PM London time (4:30AM Pacific). There were about a dozen people online, about half of them had their video turned on, and the meeting organizer (Jonathan Norman) moderated the call. 

Here are three uni-directional webinar examples posted on ProjectManagement.com (these are free to PMI Members)

• Vision to Value Webinar
• Ethics in Project Management
• Sponsorship Challenges