You either put a http link on its own line(easiest),
or wrap it into [embed] shortcode (width and height in shortcode is not required as Iframely doesn’t use it – the embeds are responsive).
Yes, we could not add wetransfer unfortunately, as it seems to be download only. Iframely is about embedding the actual content, like images, videos, etc. We’ll monitor and add support if they make actual content accessible in any way.
But in any case, I see most of their download links expire in 28 days. Perhaps, not the best to put these into blog posts.
But, this plugin won’t automatically make basic default YouTube (or other sites) <iframe> codes work? They have to be inserted into the post as only the URL or as [embed]?
Iframely plugin works the same way the native WP oEmbeds work. The plugin does not change the behaviour of the Editor in any way.
This means that the plugin simply does not know when you enter <iframe> in the editor. We only get WP triggers when there is a URL on a separate line or [embed] shortcode.
To enter the embed/html code yourself, I believe, you can just switch to HTML view as an admin and paste it in there.
Is it possible to embed a mailchimp newsletter (from the archive) with this plugin? As in, we actually see the newsletter (not a link to it) on the webpage.