CSS is affecting whole project/site not just the element I want


Title says it all - CSS is affecting my entire site not just the video I have tried to target.
I am using Classify plugin.

Here is a screen shot of the CSS I have used -


Thanks in advance!

May be better to give the video tag in your element an id attribute and then instead of using ‘video’ in the script tags use the element’s id like ‘#elementID

Thank you, I’ll give this a shot.
I appreciate your help!