Debating switching over from nikon to canon. Thoughts?

So long story short, I've been a nikon user 100% for two main reasons: Nikon is cheaper than canon, and two, I started off with all nikon lenses, so I stayed nikon.

However, I'm currently getting into videography as well as some cinematography, and recently had the opportunity to film a wedding using the canon 70D and I was amazed at the way the camera worked. This being said, I have been saving up for a while now in order to buy a new better nikon DSLR, such as the d800, or now even the d810 due to it's video features and that I have all nikon glass. But since recently using the 70D, I've been debating switching to canon for it's video features which most say beat nikon, and buying a 70D would certainly save me some money which I could use to buy canon glass.

I'd like anyone's thoughts on this as well as advice on both makers/cameras.

Being a Canon loyalist and the owner of a Canon t3i at 18mp, I can speak to Canon's video quality. I can't speak to the 70D specifically but since it's a Canon it's going to be very good.

I did a career in broadcast videography in news and sports. Then of course there was no such thing as a dslr, especially not one with video. But I'd put some of these Canon dslr's up against what we were using for news broadcasting then any day. Yes they're 1080, no they're not cinema quality and never will be.
But, if you're serious about videography and you want to use a dslr I'd suggest some attachments to go along with the camera.

For instance, an external mike. I use a Shure top mount shotgun that's great. I also use a lav mike that's excellent for interviews, which I do from time to time. I'd also suggest an external view finder. Holding the camera out in front of you is not cool and it doesn't work well.

Also I use and recommend my 18-55 lens for all my video because at 18 it helps hide hand movement which we all have. It's also an IS lens that that helps as well. Add that to my external view finder which gives you an excellent view of the screen, which is now your view finder, and you got a clean little outfit.
I know because I use mine this way all the time.

This is an interesting question.

When a few of my Canon holdouts are now finally moving over the Nikon due to the game changing Nikon D810, you seem to be swimming up stream.

There's NO way to know if a specific Canon or Nikon body will out perform the other when shooting video for a number of reasons.

* You are only using 2.2 mp of the cameras sensor when shooting if Full HD, less when you are shooting in HD.
* If you plan on shooting in low light (not simulated low light), you need a sensor that performs well in low light. Nikon has been the king at doing that since the introduction of the Nikon D3 at the China Olympics and has never looked back.
* Frankly if you are interested in "getting into" video, then you really need to be looking at a video camera, one that has 3-CCD's and ncludes genlock, 14-bit A/D conversion, built-in SMPTE time code, built-in 4-position Neural Density filter and many, many more features that dSLR cameras just do not have.

I do not know if you have been to film school or know much about writing scripts, blocking scenes, lighting scenes, using dual sound recording or editing video including the sound track with music, Foley and voice overs, but before spending all your money on making the switch, visit some of the links I have added to the source window.

It seems to me that you are basing your decision on anecdotal information and you need more than that to make such a switch.

Before you spend a ton of money buying a Canon dSLR and replacing all your lenses, look instead to buying a camera like the Panasonic AG-HPX500

Being a Canon user and fan, I'd say "go for it"
But really the decision must be yours. It seems a shame to give up the Nikon lenses you already have but if you are happy to spend the money doing a make change then it's up to you.