Yes, of course it’s the right video. Seems clear enough to me. TPE have responded to customer feedback and decided that end doors are a feature that helps to promote an InterCity/big train feel. I agree with them. Feel free to disagree or find it strange. Again, I honestly couldn’t care less.
I think it certainly does promote that. However, TPE are not an InterCity[1][2] operation (despite the fact that their sometimes slightly arrogant attitude likes to shout that). What they are is a poshed-up regional express with heavy commuter loadings, and the Class 185 is more the sort of unit that is suitable for that in layout terms.
Of course TPE has used end doors before (158s), and these used to rack up delay minutes by the tens at Manchester in the peaks due to the slow boarding/alighting.
[1] I'm mostly thinking of unicentric InterCity type stuff - TPE is quite similar to XC, and XC too would be better off with doors at thirds. It's like buses - single door works well for the traditional "everyone gets on on the way into town then the whole thing disgorges at the bus station, and reverse that on the way back" - which is basically what VTWC is like other than the via Brum services - but if you're running a cross-city service with heavy boarding and alighting at several stops having dual or even triple doors saves a lot of running time.
[2] The outlier there is the Scottish services which
are "true" IC and are a very poor fit for TPE anyway - they should have remained with XC with new stock provided or gone to the West Coast operator. But as those have got a dedicated fleet, there's no reason they couldn't have end doors while the others have doors at thirds.