I think i disasbled size requirements for in-player UI. Changed wording in popup to reflect that

src/csui/src/PlayerUiPanels/InPlayerUiAdvertisement.vue

@@ -11,7 +11,7 @@
     <p></p>
     <p></p>
     <p>In-player UI should show and hide automatically as you start or stop moving your mouse inside the player window.</p>
-    <p>Note that by default, in-player UI doesn't show if player window is not big enough.</p>
+    <p>Note that by default, in-player UI may not show if player window is not big enough.</p>
   </div>
 </template>