Hello, Andy, sorry about that. <br>
I’m only using the shortcode and haven’t made any changes to the ‘fluid-width-video-wrapper’. This change just appeared a week or three ago and I didn’t notice but as it’s within the the code generated by the shortcode I assumed that it was something you changed.The only other possibility is that a theme update includes some sort of automatic insertion of this class of Div.
The 0px padding that you mentioned has always been there and will always be overridden by padding-top anyway.
Anyways, I’ve introduced a negative margin as a work around.
Hope you had a blessed Christmas 🙂