Hello klubnichkaaa. I appreciate so much your comment.
I would like tu explain that this module has not been designed to insert a video in a Web. To do this you have already implemented many modules you can find in "The Joomla Extensions Directory" like AllVideos.
This module is a little bit more complicated and shows a list of videos created in Youtube. It means that this module does not show http://www.youtube.com/watch?v=5FOlQa2UKTA, but it shows a list where the video is included. For example http://www.youtube.com/playlist?list=PLE53CD85343ABB03B&feature=plcp.
Note that in the address http://www.youtube.com/watch?v=5FOlQa2UKTA, you can find the ID after "v" from "video" 5FOlQa2UKTA, while in the address http://www.youtube.com/playlist?list=PLE53CD85343ABB03B&feature=plcp, the ID is found after "list" PLE53CD85343ABB03B.
I hope I have clarified the doubt.