It looks like your video is embedded in a 'p' tag, and the text you want to the right of it is in a 'p' tag, as well.
I suggest putting your video and text in a single div, and then embed two divs inside that, such that:
<!--put video here-->
<!--put text here-->
width:900px;/*width of container div*/
width:480px;/*width of video*/
width:420;/*remaining width of container*/
You'll likely have to adjust widths of divs to allow for any white space you want around the divs.