I just tested the insertion of YouTube video to the e-shop. With the hints added under http://opensolution.org/download,en,18.html?sDir=Quick.Cart/plugins > youtubeLinks. It has worked excellently. But because of responsive template, it broke the design on a tablet, netbook and smartphone.
And here is my solution:
1. adjust everything as described in mentioned hints. 2. add to <your_template>/style.css