i can't see your example. There is something wrong about your links. Anyway, here is a quick example. This is not the best method but it gives an idea at least. As Ayumi said; you can use buttons etc.

Code
///////////////////////////////
#include <acknex.h>
#include <default.c>
#define PRAGMA_PATH "%EXE_DIR%\templates\images";
#define PRAGMA_PATH "%EXE_DIR%\samples";


//panel bitmap
BMAP* video_bmap="#512x512x24";
BMAP* pause_button="rock.tga";

//video handle
var vid_handle;


PANEL* video_panel=
{
	layer=1;
	bmap=video_bmap;
	flags=SHOW;
}

function pause_event()
{
	//pause the video
	media_pause(vid_handle);
}
PANEL* pause_button_panel=
{
	layer=3;
	bmap=pause_button;
	
	//if click the pause button
	on_click=pause_event;
}


function main()
{
	fps_max=75;
	video_mode=9;
	video_screen=2;
	wait(3);
	
		
	//play video on panel
	vid_handle=media_loop("blabla.avi",video_panel.bmap,100);

	mouse_mode=4;
	mouse_pointer=2;




	while(1)
	{
		
		//mosue over
		if(mouse_pos.x>video_panel.pos_x&&
		mouse_pos.x<video_panel.pos_x+video_panel.size_x&&
		mouse_pos.y>video_panel.pos_y&&
		mouse_pos.y<video_panel.pos_y+video_panel.size_y)
		{
			//show pause button
			set(pause_button_panel,SHOW);
			draw_text("PAUSE",pause_button_panel.pos_x,pause_button_panel.pos_y,COLOR_RED);
		}
		else//not
		{
			//resume video 
			media_start(vid_handle);
			
			//hide pause button
			reset(pause_button_panel,SHOW);
		}
		wait(1);
	}
}