- Sony has not officially announced any firmware update that enables internal 4K recording on the a7s. Sony is known to be very strict about its camera specifications and has never released a firmware update that significantly alters the hardware capabilities of its cameras.
- The video provides no credible evidence to support its claim. The video does not show any actual footage recorded internally at 4K resolution on the a7s. Instead, it only shows a screen recording of a menu that claims to enable 4K recording, but this could easily be faked.
- The video's source is not credible. The video was uploaded by an unknown YouTube user with a history of posting misleading and sensational content. This user has been known to make false claims about camera technology in the past.
Based on these factors, it is highly likely that the video's claim is illegitimate and that the a7s cannot actually be hacked to shoot internal 4K. If you are interested in purchasing a camera that can shoot internal 4K, there are many other options available on the market.