I'll have to watch the video, but double-fencing does work if it's tall enough and widely spaced, otherwise the deer just jump over the whole thing. To prevent deer, one needs 7'-8' fencing.... with double fencing that can be 6' or a bit less so long as the inner fence is almost as high or at least further away. Plants in front of a lower fence also work so long as the deer can't see beyond them. Good luck. I've been fighting mine for a few years, but it's hard when they were foaled in my yard and consider it home. They will find any little egress and bash through most barriers. The water scarecrows worked for the larger deer, but the little ones ran under the water, but I worried about leaving the water on when away. I think I may have finally put enough fencing up to deter them. If only they didn't eat my plants, I'd welcome them as seeing them grow up was a a lovely experience.
