problem with video themes

hi.
I’m trying 2 themes that have special features to publish video posts.
the first is “Periodic” ( which is translated to an other language) and the other on is “premier”
but I have a common problem with both themes.

when I use the video player code inside the main text-field of the posts, I have no problem and the video player will be shown in the post but when I embed the video code in the theme (by It’s special plugin, like “simple video embeder”) , just the code will be shown not the Player.

could you please help?