How to download audio file for free? Where I can find instruction?
If you mean the watermarked preview file, you can download this from the Item Details tab on the song’s page (the one with the player). On the player, there is a little arrow pointing down on the far right of the player controls, next to the loop button with the infinity symbol. Click on this and you’ll get a save dialog to download the preview to your hard drive.
There is also always a free file of the month maybe could fit on your video now or next in the future