Maybe I'm just naive, but I didn't get the impression that the youtube video poster was claiming that was of her braiding her own horse, I just got the impression she was posting a video showing HOW you do those braids. Maybe that was just my interpretation though...
Btw the magic trick to getting horse hair to grow is a diluted mix of aloe and conditioner/cream rinse. Ke would either rub or chew his tail at the top and i put that on there in 2 weeks it made an extremely noticeable difference.
In this pic you can see how short all the hair was at the top. This wasn't long after I had gotten him.
If you look toward the top of his tail you can see how much more fuller it is. Its what workes for me. After: