Hey @info48! Hosting webinars isn't something our landing pages are specifically set up for, no. Whether this is possible would likely depend on several factors, such as embedding requirements for your webinar stream.
We currently support embedding YouTube & Vimeo videos on landing pages, via their URLs (more info here50). If you're on a ConvertKit paid plan, you also have access to HTML blocks in landing pages. You might be able to leverage those tools to make something work; however, I couldn't make any guarantees. In any case, I'd definitely recommend a 'test run' to ensure everything works as expected! Sorry I can't be of more help with that.