Yeah sure, it works fine. It’s just slightly easier for the reader if you are able to embed them right in the post using img tags, but that’s a bit more work for you because they need to be the right resolution. To get them in the post just get a direct link to the image you want to embed and put it in between the img tags, like so:
[img]https://i2.sndcdn.com/avatars-000002284831-y93rbx-t200x200.jpg?3eddc42[/img]
I got that link by going to my own soundcloud page, rightclicking the image and copying the image url. That works on most websites, but not on flickr so that might not be the right choice as an image host IF you want to embed pictures.
This afternoon when I watched your images I just looked at the flickr album you posted. The other links I didn’t try, but I just noticed something went wrong in the formatting, because these links are truncated. If you want to paste a link to an image make sure it’s not automatically shortened when pasting it.