The site is http://testsite1.seyoum.net/
Note that the theme I am using is a child theme of twentyfifteen. You can download the theme files here:
So far I have managed to make a custom post type called “Soundcloud” and I also have a custom field where I can add a soundcloud link that automatically turns into a widget (thanks to the the integration of oEmbed in wordpress:https://goo.gl/ZlOfxT)
How can this be achieved? Preferably I would try to avoid using css. Perhaps some php skills would help here?
I believe the problem is that the oEmbed functionality is adding height and width to the iframe that contains the widget, but I am not sure. At least it looks that way if I inspect the iframe: