If you have the budget, the 70D would be my pick of the litter. Keep in mind, if you own an iPhone and are simply publishing basic vlogs to YouTube, you might not need anything more. If you’re aiming to achieve “filmic” results, and want to interchange lenses (so you can capture close-ups and wide angles for instance) then definitely give these DSLR cameras consideration.
What Adobe Premiere Pro is to Windows PCs, Final Cut Pro X is to Mac users. It's the best video editing software for Mac. And, as you would suspect with Apple software, the must-have editor is consummately easy to use and comes packed with enough features to warrant the admittedly high price tag. We like the grouping tools, effect options and the simplistic way you can add and edit audio. If you're already entwined in Apple's ecosystem, you'll appreciate how Final Cut cleverly coordinates with your Photos or iTunes collections.
The T#i line is what they call a "pro-sumer" line, which is basically between a consumer line camera like a very basic DSLR and a professional DSLR camera, thus the term "pro-sumer." Typically what this meant is an DSLR with an APS-C sized sensor, decent resolution, and some hand-me-down professional features of pro-grade cameras from a few years ago. For this reason, sometimes it's not worth upgrading from one of these cameras to the next until at least a few generations have past (meaning if you have a T5i, it's not really a giant leap forward to upgrade to a T6i). However, the T7i is somewhat different. When I was doing research on what features it has and what it is missing compared to the pro-grade DSLRs that are considered "current" right now, I was surprised to find very little. The main differences really is that the pro-grade cameras have the LCD display on the top that would display all of your relevant camera settings, and then a few of them would also sport a full-frame sensor. Other than that, the differences are very minor. Something like maybe 1 or 2 frames less in burst mode or something like that. Nothing that would really jump out at you and make you regret not stepping up to the professional grade equivalent (Think it would be the 77D?). It actually has pretty much all of the big features of even their current pro-grade DSLRs, making the T7i probably one of the best prosumer DSLRs to buy.