The integration itself isn't too time consuming, but you do need an administrator to set it up. Once you have it set up, you get a lot of cool features such as tracking who registers, attends or watches the recording.
What about posting your Webinar to a youtube video? You can embed the video on a landing page. Youtube also tracks the numbers of views, even on embedded videos. That will give you a count of views only, and not a list of people specifically.
You have to have a form if its the first time that a person is engaging with your content, otherwise they will remain anonymous. Then, if you already have their information in your database and they watch and additional webinar via one of your landing pages, it should still track them.