Can I add other extra fields except the video on the RSS feed page?

I have K2 v2.3 and Artio JoomSEF v3.7.4 Free. Everything is fine except RSS. URLs in RSS are not rewritten and remain like "index.php?blablabla". How to apply SEF plugin to RSS feed output?

I would like to add a read more link or a text link to source directly in the item description because of contect scrappers.

Output like this:

 

&lt;item&gt;&lt;title&gt;&lt;/title&gt;&lt;link&gt;http://www....&lt;/link&gt;&lt;description&gt;Description text and image AND (Title/Readmore+Link)</description></item>Maybe i can add it in components/com_k2/models/item.phpfunction prepareFeedItem(&$item){Add this code://Read more link$item->link=urldecode(JRoute::_(K2HelperRoute::getItemRoute($item->id.':'.$item->alias,$item->catid.':'.urlencode($item->category->alias))));Inside the discription//Description$item->description = '';
 

Can someone help?