Powerful enough?

The 2011 15" has a history of the AMD dGPU failing due to heat causing failure of the lead free solder. Since the dGPU is soldered you can not replace it. Your desired use for video editing will stress the GPU and cause increased heat.

I would recommend avoiding the 2011 15" MBP.

You could google for "2011 Macbook Pro readeongate" to see what others say.

 

Indeed, the 2012 was a particularly bad model for graphics card issues. That's why Apple initiated the repair program for the 2011-2013 MacBooks.

If you can, try and get a later model, it'll probably be safer. But beyond that, you should have no problem editing 1080p footage. I had a 2012 model with similar specs for a short time and it coped well with video editing.

 

As others have stated avoid 2011-2013..... I got a 2012.....and expect an issue down the line...finger crossed I'm wrong