The codes you're grabbing appear to be a different "language" than the one forums use. If there is one listed as a BB code and starts with IMG tags in square brackets, use those. Anything with the greater than/less than brackets won't get used. Instead of using the iframe tag, you can just use the URL for your image in the tags for img.
Code:
[img]https://bn1304files.storage.live.com/y2m0ZxdSqbZbF0tyo7ubrz_NOOVEwd_K_7Gs0F9kPQ6sGXEdicQuIP4gU5B1cpzWCjbxd-GwqWFiJCt8HeDYHvH2Wjhjvuy5oA0QQbYpzZ37pw/summer.jpg[/img]
(summer fun image)
or
Code:
[img]https://dz2u3q.bn1304.livefilestore.com/y2mG_fYJyuN1Wflshx3Ri1PgsrhpNx8ewPQ9ghSmchfiZeephzu4lWUKdSbuIM-6f6OPIjdJUB_qPjkMNKa1Tq09Pmr1CSa6qvBinskbvP0C2iV0plekVJWgUPvOp64Xkr7/Untitled-self.jpg[/img]
(english budgies image)
(I took a kind of roundabout way to get the original and full sized images - the OneDrive links take you to thumbnail pages with links, so when I saw the full size/original images, I right-clicked and selected Copy Image Location. Since these are your images, you should have access to the "direct link" for the images. If you do, you can copy this link and click the button on the forum to embed an image and just paste the link.)