Clearly discriminatory here
If the technology exists to make a website or technical product accessible it seems reasonable to expect it to be so under both UK and US laws.
IANAL, but, surely if this is on their website and is distributed by their website for playback in their website or apps, then surely they have a responsibility to try to the best of their ability to comply with anti disability legislation?
I note that currently Dominos is under fire in the US due to it's 'bricks and mortar' store presence mandating web compliance. Amazon is rumoured to be opening physical stores, so perhaps is equally tied?
Certainly it would seem sensible for their most important website - the UK one, to be compliant with the reasonable expectation of accessibility?