Get url attribute value

I would like to get the value of the url attribute of the <enclosure> tag in an RSS feed’s <item>, and then save it as custom meta (enclosure_url). I’m using a custom post type of “podcasts,” and my theme templates for that will then display the enclosure_url the way I want it. (I want the audio file to remain on its original server, and not be imported to mine.)

“Options for audios” appears to do nothing whatsoever. I have enabled “Get also Audios from RSS” and its sub-option “Also enclosure and media RSS tags.”

What does this do? Nothing evident…

I also tried (with the Professional add on) putting enclosure as “Feed Tag,” then {enclosure} as Template, under “Custom Feed Tags.” Then in “Custom Fields” I put enclosure_url for “Name” and {enclosure} as “Value.”

This approach doesn’t work. It does save a custom meta to the new post of enclosure_url, however with an empty value.