For those who read the title and skip the video, it should be noted that the triforce is not available in the game in any fashion that is available to you with just the standard game cart. However, with the advent of things such as game shark, it is technically possible to make the triforce available to you in any fashion there is. This is likely what caused all the screenshots way back in the day showing link obtaining the item.
While it is well known you can't get the triforce in game, it's nice seeing someone go over the old popular methods for us as a reminder to the era of OMG I GOT THE TRIFORCE. You know, when people actually believed it was possible. This, despite Nintendo stating that it wasn't so.