Adjustment on Youtube Video Size and Space between Paragraphs

Hi there,

Youtube Video Size – Youtube videos on my website’s pages appear to be too large for the website template, e.g. youtube video on this page http://www.korpungun.com/2013/11/01/shoreline-community-college/ (or you can see in the first attached). You may see that the video is displayed too wide, and it takes over the area on the sidebar menu on the right. Could you please educate me on how to adjust the display size of the video, so that it does not reach to the sidebar menu’s area?

Space between Paragraphs – You may see that the spaces between paragraphs and bulletin lists are not quite organized if compared between the lists in the second and third attached. In other words, I mean the lengths between each enter are not the same, and I cannot find a way to adjust them. Could you please also educate me on how to make an adjustment to this?

Thank you in advance for your response!