This video is the right thing to do.
Trump does appear to get winded at various points throughout, however. https://twitter.com/realDonaldTrump/status/1312525833505058816

For people questioning whether the video was recorded at Walter Reed, I don’t have any way of confirming or refuting.

However, it’s simple enough to set up a backdrop and a couple of flags, and the Presidential Suite there is quite extensive. https://twitter.com/richard680news/status/1312413225061961728

The above photos are apparently of the old Presidential Suite and not the current one at Walter Reed.

I’d expect the current one to be at least as extensive and to have a space dedicated to recording.

More transparency would be a good thing right now. https://twitter.com/reeseer1/status/1312534360940187649

This article confirms the photos being circulated (and that were published by the @nypost) are NOT current, but rather are of the old Walter Reed suite: https://www.usatoday.com/picture-gallery/news/politics/2020/10/02/inside-walter-reed-army-medical-hospital-vip-treatment-ward/3596886001/

This thread describes the current Presidential Suite at Walter Reed.

I haven’t yet found any photos of the current one, but I would discourage people from using the white cabinetry in the video as supposed evidence that it wasn’t recorded today. https://twitter.com/macfarlanenews/status/1312145401307250688