Unfortunately, there is no smartnaming option to pick the name from the topUrl parameter.
Using the smartnamer, the video file name can be extracted from various sources with the following options:
- header-url: uses the content-disposition HTTP header if present otherwise the URL of the video (not the page)
- page-title: uses the /HTML/HEAD/TITLE element text
- page-content: uses the whole content of the HTML page
- obfuscated: from a digital signature of the page URL
topUrl is the URL of the top level HTML frame that contains the video.
Is there any chance you can find your desired label in the content of the page ?