WordPress post featured image

Howdy rakusac,

Honestly, I haven’t ever done this, but this plugin looks like it may do the trick:
https://ww.wp.xz.cn/plugins/featured-image-from-url/

I often use Jetpack’s Photon module which copies images that you upload to wordpress.com and it then serves them up from wp.com. The catch there is that you have to upload to your host first.

I hope that helps!