Changing the colour of the pink video tab

Hi there, I’m not sure if this a theme question (I am a complete novice btw – in case you hadn’t already guessed) – soooo

When I embed a video there’s a pretty pink ‘video’ tag on the page. Now this may be pretty but unfortunately it kind of clashes with the theme so I was wondering if it’s possible to change this to say blue or green to match the header?

Here’s the page I’m talking about.

https://learnenglishspanishonline.com/me-llamo-dina-de-nicaragua/

But as I say, I’m not 100% sure that this is something to do with the theme or if this is the right place to ask.

Thank you for your patience.

PS I’ve just noticed that after editing a post your button to save and exit post says ‘edit post’ instead of ‘submit’ or ‘save’ or something along those lines, just fyi ??