Thank you Thomas.
I know how to use DOM syntaxes (its similary to vfp OOP syntax) and its very usefull from vfp.
i tweaked a long time ago my registry to emulate IE as IE11/edge (the top of modern IE)
(a simple method is to add a line to the meta tag of html code as:

<meta http-equiv="x-ua-compatible" content="ie=edge" />

i can code shortcuts specifically for youtube player (there is more 25) with sending keys on focus...no problem

my question was : how to access to the youtube player object (created by Youtube JSapi) from visual foxpro (from buttons
on a form par ex.) ?
in other words:
what kind of DOM syntax can i use from vfp to access to youtube player PEM and objects as buttons in toolbar ? can be even JS functions.
how can i identify the difrent buttons of youtube toolbar if i can send a click from vfp ?