XF 2.1 What's available for message templates in XML feed importers?

[HJW]

Using this youtube XML feed as an example - https://www.youtube.com/feeds/videos.xml?channel_id=UCsRM0YB_dabtEPGPTKo-gcw

For each entry {title} works fine, but is it possible to get the data from <media:group> like <media:description> in the template without any custom development?

Or is it possible to get the data for yt:videoId? {yt:videoId} doesn't seem to work

thanks