Blog post links and inserted movies not always visible

Hi, I have a problem when I insert links to pdf or word files in my blog posts. They are only visible if you click on the blog post itself, but the link doesn't work on the overview pages like the general blog site or under the 'category'. Same problem when I insert a youtoube movie, you just see nothing on the overview pages and under the category page. You have to know that you have to click on the title of the message to see what it is about, but it seems not clear to me. Is there a possibility to change that? I really love the theme, I hope I can solve this because that really bothers me... For example: http://www.leefwijzer.net/category/omgaan-met-het-leven/ Try out: should be a link to a pdf file Nietzsche is a youtoube movie that you will only see when you click on the title... Hope someone can help me with this! Thank you very much, Tine