Love Brasil ❤

Watch the whole video. It's for decoration. The blacksmith shows a real horse shoe at the end.

It was just for show. I imagine because making real one would take longer so he made miniature one to show the technigues

If you watch more blacksmith videos, you'll see that it's often a customary approach to hammering during certain phases of making / repairing objects. For the roughest shaping, often it's simply one hammer-strike after another -- without pause -- on the yellow-to-red hot metal. On the slightly more "precision-oriented" phases, it's common to bounce the hammer on the anvil before and/or between strikes. It can: 1) help to set a rhythm for the work overall and for keeping the motions synchronized between the hammer-hand and the off-hand (which may need to adjust the position of the work or auxiliary tool), and it 2) partly helps in keeping the hammer-hand "calibrated" to the weight & therefore the force of the hammer-head. No matter how many years a smith has worked, it helps their hammer-hand to keep the "just-right" amount of force being applied in each step, because *undoing* the results of excessive applied force can make for so much extra work compared to incremental forward progress. There are other aspects as well, somewhat depending on the individual smith and the traditions or mentors that helped shape their mode & manner of work.

Rhythm is why.

watch till the end of the video; he shows the actual horseshoe. The one he made was a simple 'model'