Created attachment 192300 [details] a test slideshow created with Powerpoint 2016 I inserted a video into a slide with Microsoft Powerpoint 2016. With Powerpoint I can access to control buttons when I'm editing the slide or when I'm launching the slideshow. With Impress, I've no control buttons.
Created attachment 192301 [details] Powerpoint 2016 control buttons displayed while editing
Created attachment 192302 [details] Powerpoint 2016 control buttons displayed during the slideshow
Created attachment 192393 [details] The example document in 24.2 The controls are somewhat hidden in the sidebar and in the View - Toolbars - Media Playback toolbar (this needs to be enabled manually, the sidebar does not) Of course making them floating below the object is missing... along with a lot of similar toolbars (text formatting in Writer, Table editing, etc., etc.).
*** This bug has been marked as a duplicate of bug 87040 ***
Maybe just additional entries into the contextual menu ("right click" with the mouse) : - play - pause - stop - ...