How do I extract media URL (like yt videos) from RSS app feeds to add them to my blogspot?

I’ve tried with scraptio but it’s hard for me to fully understand the logic behind, i’m kinda still a newbie. I’ve seen that there are filters, so my question is, how do I filter it to only grab and add youtube videos or any other video media that there are in the fetched article/feed (when there is any, of course) and auto add it to my article for my autoblog?