Originally Posted By: janerwac13
how can i show the videos without that i can listen to the Soundtrack


Delete the sound from the video, then use media_play for playing the video.

Originally Posted By: janerwac13
how can i write what plays the next song if the last song is ended or the i press the F1 butte to listen to the next song when this song is bad.


Try this example:

Code:
var song = 0;
if(key_f1 == 1)
{
    song += 1;
}

function song_startup()
{
    while(1)
    {
        if(song == 1)
        {
            media_play(REPLACE_THIS_WITH_YOUR_OWN_STUFF);
        }
        if(song == 2)
        {
            media_play(REPLACE_THIS_WITH_YOUR_OWN_STUFF);
        }
        if(song == 3)
        {
            media_play(REPLACE_THIS_WITH_YOUR_OWN_STUFF);
        }
    }
}

and so on...