Latest video is now out - it is in fact about the Texas Eagle from Chicago to LA.
He brings his dad on this portion of the journey, which he did on some of his previous videos on Canadian trains (the Rocky Mountaineer and the Churchill route). In the video, the inferiority of the flexible dining (and the lack of the lounge car) is definitely highlighted, as they look forward to having the full diner and lounge after San Antonio. In San Antonio, they walk around Riverwalk a bit during the layover, and get burritos from the Burrito Lady in El Paso.
I do see where the title of the series is a bit misleading - this is more of a trip across America to ride trains as opposed to riding trains across America. Even if you accept that they won’t be able to ride a train all the way to Alaska, at this point they're not doing anything resembling a direct route - the Texas Eagle takes them much further south than they need to be. Also, the next episode will be on the Rocky Mountaineer US route, which is nowhere near where they are or will end up.
Regardless, this was an entertaining video - I generally like the ones that focus on the train ride more than the ones that focus on other attractions. I wouldn’t choose the Texas Eagle in its current state to travel end to end (the Southwest Chief goes Chicago-LA and has a lounge/traditional dining the whole trip), though it is the longest train ride in the US. I’m definitely interested to see his take on the US Rocky Mountaineer, as his video about the Canadian Rocky Mountaineer was pretty good. Just don’t take the title too literally…