Bishop, I wouldn't want to be the one to call the fire department and tell that my dog has climbed a tree and can't get back down! Looks like an active little fellow and he seems to do well in your other video's as well. Looks like a keeper.
He not for sale looking for a jack Russel or fox terrier to breed him with to get a puppy off if them or a boarder terrier or maybe a whipit
Our Cairn Terriers have that same bark when they're after a squirrel (or cat, Doberman or butterfly)...fences are merely a suggestion. Great dogs!