I finally managed to fix images' links in my personal website RSS feed, in #astro
It wasn't trivial at all! And I have to thank Billy and his post here:
https://billyle.dev/posts/adding-rss-feed-content-and-fixing-markdown-image-paths-in-astro
Still not super happy because I need to find a way to include multiple collections to this set up, which I can't make it work right now...
Also ditched many bad practices like using <br> in md files.
Still need to find a way to deal with <figcaption>.
But for now my #RSS feed looks fine!
Another rabbit hole: <iframe> into RSS.xml.
I looked at YouTube feeds and apparently they're using the media-rss specification (from yahoo, nonetheless).