I just tried this with my 70d & it did help eliminate moire but the video quality looked much softer. 
I think the same was mentioned in the conclusion from the video:
"Conclusion:
To me, the results are great. The moire is eliminated. I know this won't work in every situation, but it is a handy trick to have available.
There are unsurprising costs. The depth of field is deeper. The image appears just a little soft with the digital zoom, albeit with decent detail -- and I might not have the focus perfect. For me, I'll trade off the moire in favor of a little softness in the image if I have no choice. The other cost isn't shown in this video, but I've seen it in other video I've shot with the 3x zoom. The noise at higher ISO's is (not surprisingly) worse in the 3x zoom mode. So, the tradeoff might not be so clear in a low-light setting, as the ISO noise might be more offensive than the moire. My guess is that this might become an issue at ISO 800+ or so. But, in daylight, is unlikely to be an issue.
... Since I already have the Tokina (and love it), I'll use it with the 3x zoom when I have to in order to eliminate moire. I will not use it to replace a 50mm otherwise, as I prefer having the sharpness and shallow depth of field option if I don't have to worry about moire."
Who would want to shoot a potential aliasing/moire subject in low light? That's kind of like shooting a polar bear in a snow storm and aiming for detail. COMPOSITION is sometimes is influenced by common sense.
The other video using 5D MkIII, noticed less contrast in 3X shots. That's something which can be addressed by changing your exposure or shooting RAW and address in post. Its not a perfect solution, but if handled correctly a livable one.
Perhaps if you add a bit of hard lighting, it will increase the contrast as well? Hmmm ...