CZ is a modular platform and I think that is where it's greatest market ting strength lies, if selected, it should not take a lot of effort to produce a 7.62 version, if work on one has not started already. Its common for arms manufacturers to be continuously playing with their platforms even if they never reach past the mock-up stage so you can bet there is some contingency involved. Even POF experimented with 5.56 G3 variants.
That being said, I believe that the 7.62 will continue to be our infantry mainstay I can say this because our troops our used to it, we have plenty of stocks, it suits our way of making war and lastly, the Chief in the same video inaugurates another 7.62 production plant in POF which means we have a bright future in store for that round.