If you’re going to try it, don’t let it be the trophy of a lifetime. Yeah I’ve seen the videos and I’ll say it’s luck more than anything else on a whitetail. Better be the perfect angle and split the hair you’re aiming at. I wouldn’t try it from a tree stand and probably wouldn’t from the ground. Never hunted elk, but I’d think they have a larger opening to slip an arrow into. And as already stated, you won’t get much of a blood trail and if you’re lucky and hit the heart, then great. If not, you’re only getting one lung and they can run a mile on one lung.
And that's a deer, elk are incredibly tough. I seen an elk that was one lunged (broadside, but quartering more than the hunter thought) that we finally tracked down two days later, it was sick enough it didn't get out of its bed and he pincushioned it, but it was still alive and had its head up. I one lunged one with a 270 once and tracked it a mile and a half before I caught up to it to finish it. I recall another archery hunter who shot a 7 point bull a couple years ago, in the thick brush the bull came in different than he expected and the hunter twisted around kneeling and made the shot at 7 yards... but the lower limb of his bow hit his knee on release and the string came off. We knew the elk was hit, but not how. after giving it an hour we went about a hundred yards and jumped it. Now we knew it was pretty sick, but it was in absolute doghair brush, plus the hunter didn't have a functioning bow to use if we did get an opportunity for a finish shot. Backed off and gave it about 4 hours, would have liked to give it more, but it was in the mid 90s and I knew if it laid dead with the guts in it for any length of time the meat would be ruined. Went back in with his buddy and found it a couple hundred yards farther, still alive, but sick enough we got within just a few yards before we jumped it and his buddy put a finish shot in it. That one when we examined it was shot perfect behind the front shoulder, but the arrow didn't have enough energy to do more than penetrate one lung. And I never found a single drop of blood on that trail.
Even with a rifle a frontal shot is hit or miss on a blood trail, sometimes they bleed like a stuck pig, other times I've tracked them with a fresh snow and they never bled a drop until they tipped over. They usually aren't going far (a deer seldom moves when hit with a big rifle straight on, but elk can soak up a tremendous amount of lead without going down unless you hit a big bone) so I'm good with that shot with a rifle, but it sometimes takes a bit of work to find them.
There are a tremendous amount of elk stuck with arrows every year and not recovered, this is why a lot of old timers despise bow hunting. Things happen, I know that, they happen with a rifle to, but you have a little more leeway with a rifle, plus the ability to make a quick follow up shot, or track it down and shoot it on the run when you jump it, that isn't so feasible with a bow, and if you take questionable shots you are going to lose a lot more game.