60D owner here coming from shooting Rebel models for many years – it’s a good upgrade. Definitely a bigger, more solid body. Focus is snappy through the viewfinder but sometimes has to hunt around when in live view mode. Well worth it.
I use a 60D with a Canon 17-55 IS for about 50/50 video and stills, and it’s been a great combination – I mostly shoot landscape/nature/time lapse on both formats. I couldn’t work without the flip out screen on the 60D, and the Canon 17-55 is a phenomenal lens. But it is quite pricey, and it does have a limited zoom range (I think it’s equivalent to a 28-80 on a full frame camera), so keep that in mind if you want to shoot people who might be kind of far away. An image stabilizing lens is crucial for shooting video or low light still photos (but don’t forget to turn off stabilization if you’re doing a big pan!)
The only drawback to video on the 60D is aliasing and moire. If you shoot bricks, blinds, or stripes, you will see moving lines (unless the camera is completely stationary). I also see it in areas with small foliage (either on trees or on the ground) when the camera is moving. That said, a noise removal tool like the Neat Video plugin for After Effects helps to reduce moire in situations where it’s distracting.
If you’re going to shoot parkour, I highly recommend getting a Glidecam stablilizer and practicing hard at using it. Your videos will look fantastic if you can run alongside your subject while filming.