Reddit mentions of AVerMedia ExtremeCap U3, Full HD USB Video Capture Card, High Definition 1080p 60fps Recorder, Ultra Low Latency, Win 10 (CV710)

I use the AverMedia ExtremeCap U3. To do 1080p60fps your computer will need to have a USB 3.0 port, otherwise it'll be 30fps.

The only way i have found to do this is with one of these. The HDMI is output only on the retina MacBookPro. An HDMI to USB capture card while expensive will work. The one I have linked to is the one I have my eye on.

Edit: The reviews seem to indicate little to no lag on this one.

You honestly don't even need a PC to record TV. This Capture Card records up to 1080i 60fps or 720p 60 fps through a component cable:

http://www.ncixus.com/products/?sku=65026&vpn=MTVGCAPHD-C281&manufacture=AVERMEDIA

You can put an HDD inside or a USB Stick and it'll record on that.

If you want to record 1080p 30 fps you case use this one:

http://www.bhphotovideo.com/c/product/983193-REG/avermedia_c875_live_gamer_portable.html

If you want to record 1080p 60 fps I'm afraid you'll need a PC. This is the only capture card on the consumer market at the moment that records 1080p 60 fps:

http://www.amazon.com/dp/B00G9QTUVE

If you choose this last option you also need a PC to record on. Something like this will do the work:

PCPartPicker part list / Price breakdown by merchant

Type|Item|Price

----|:----|:----
CPU | Intel Core i5-4590 3.3GHz Quad-Core Processor | $198.95 @ OutletPC
Motherboard | ASRock H97 PRO4 ATX LGA1150 Motherboard | $88.99 @ Mwave
Memory | G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1866 Memory | $81.00 @ Newegg
Storage | Crucial MX100 256GB 2.5" Solid State Drive | $104.99 @ NCIX US
Storage | Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive | $83.49 @ OutletPC
Video Card | MSI GeForce GTX 750 Ti 2GB Video Card | $139.99 @ Newegg
Case | Corsair 200R ATX Mid Tower Case | $39.99 @ Newegg
Power Supply | Rosewill Hive 550W 80+ Bronze Certified Semi-Modular ATX Power Supply | $39.50 @ Newegg
| | Total
| Prices include shipping, taxes, and discounts when available | $776.90
| Generated by PCPartPicker 2014-08-06 12:31 EDT-0400 |

Keep in mind this is already an extremely overkill build. You can save up to 400$ without affecting the recording performances (but of course you will affect render times/games performances/material quality/everyday usage).

You don't really need seperate cards, but the older consoles have more cheap options.

Here is capture card, you also need to buy a powered hdmi splitter with it: https://smile.amazon.com/dp/B00G9QTUVE

If you wanted a 30 FPS card instead of 60 (or if you don't have a computer with good USB 3.0 ports), you can save $40 and get the LGP lite instead.

I bought this to use on my macbook. Works great, I just use it to play on my laptop screen while traveling.
http://www.amazon.com/gp/product/B00G9QTUVE?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00

You'll want USB 3.0 to make sure you don't have lag though.

I didn't have this exact one, I had the HD60 and it worked horrible with Smash for Wii U so I switched to an AVerMedia ExtremeCap U3. It's not perfect (sound bug for the first ~2min when streaming) but I had nothing but problems with El Gato so I tend to stay away from their products now.

I can't speak for whether or not your camera can output 60fps via HDMI, but what you do need for this setup is a way to connect that HDMI output into your PC which is what capture devices are for.

Your biggest issue here is that 1080p60 is not a standard video resolution and framerate combination, so it's not a very common option on professional equipment targeted at working with broadcast standard footage.

Instead you could look at 'gamer' oriented gear like that offered by AVerMedia. They're not as robust as professional equipment and might not play nicely with professional software, but they're easy and relatively cheap.

As far as I'm aware, Premier does not support 60fps capture, so you'll need to use additional software to capture the footage and encode it. The software that comes with the capture device should suffice - it won't be broadcast quality, but it will be 60fps and plenty good enough for web use.

Cool, just making sure, since you linked to their site directly, this is the same one right?

http://www.amazon.com/AVerMedia-Recorder---CV710-ExtremeCap-U3/dp/B00G9QTUVE/ref=sr_1_1?s=electronics&ie=UTF8&qid=1411166787&sr=1-1&keywords=avermedia+extremecap+u3

https://www.amazon.com/gp/offer-listing/B00G9QTUVE/ref=dp_olp_used?ie=UTF8&condition=used

Mine is the $135. Really enjoyed it, but I'm not streaming/recording anymore. I'm a firm believer in the AVermedia products.

For a cheaper device, there's the ExtremeCap U3 which can do 60 FPS and negligible lag, but you're limited to stereo sound.

Unfortunately, when you want 1080p/60 with multichannel sound, afaik, there are no consumer level devices. You'll need to be willing to spend $1000 or more. And when 4k comes, it will get even higher. Unfortunately, USB3 won't be able to handle 4k, so you'd need an internal PCI card. (And hard disks themselves aren't fast enough to capture uncompressed 1080p without working in tandem).

Maybe you could use this, but I have no experience with it.