Youtube play button not centered

Hi,

The play button of embedded Youtube videos is not exactly centered.
For bigger embeded videos this is not very noticeable (if one doesn’t know the offset is there).
But especially for smaller embedded videos (for example 10% of the screen width) this is very annoying, as the vertical offset becomes about 20% of the iframe height, en the horizontal offset about 10% of the iframe width.

Any advice would be very helpful!

Martijn