tv - How to play 4096x2304 video on 3840x2160 Samsung UE65HU7500

[To the close voters: TVs are basically tablets now, and similar questions were welcome here in 2012. Please support this proposal and migrate your TV questions if firmware and such are off-topic now.]

I've downloaded some 4K videos from YouTube to a USB stick, but some that are more than 3840 pixels wide, like this one, won't play on the Samsung UE65HU7500 TV i have here. The TV says the resolution is not supported.

The goal is to have a giant wall-mounted tablet; is there a way to play real 4K videos without connecting another computer?

I've resized the video to the TV's max resolution, using ffmpeg:

ffmpeg -i TheWorld.mp4 -s 3840x2160 -acodec copy test.mp4

Apparently, "4K" is a misnomer, as the TV is actually QFHD:

QFHD stands for Quad Full High Definition and it’s exactly four times the resolution of 1080p. QFHD or Quad HD measures 3840 x 2160 pixels, and it’s a digital television format with the same widescreen 16:9 aspect ratio you are used to watching at home. QFHD is literally like combining four (two-by-two) 1080p TVs together.

Many manufacturers are marketing their QFHD products as being 4K, which has now become a catchall phrase. So if you hear about a 4K TV, the resolution would actually be 3840 x 2160, i.e. Quad HD.