I'm not even sure what "scale" these are built to. All I can determine is these are (almost) all "models" of Chinese prototypes made for the Chinese market, though the YouTuber is in/from Vietnam.
We've all seen similar battery-operated plastic-tracked toy-grade trains in convenience stores (and probably on Aliexpress). This operator however takes them to an extreme in terms of quantity of trackage, train length (sometimes 20+ cars), and variety of models such that one starts to wonder how 'toylike' these things are intended to be in the region where they're normally sold, given that extra track and rolling stock appears to be available on a separate-sale basis (though at the numbers demonstrated by this channel the owner had to have spent a considerable sum on them)
(above) This title translates (via Google Lens on my phone) to "Battery operated passenger and freight model train system". The Chinese writing on the hoppers appears to translate to "Coal mine own coal hopper truck" (though Google Lens is indecisive on that, depending on what angle I hold the phone relative to my laptop's screen)
Curiously enough, US-style three-dome tankers (complete with Shell logos and reporting marks) make an appearance as well, adding further mystery as to the breadth of models being made for this track system, and the number of manufacturers serving it.
(above) Translation: "Model trains running on rails and having problems". I included this one to showcase the China-prototype passenger cars offered in this size. I'm unsure if all these trains come from the same manufacturer, but the level of detail in these coaches is...well, unusual considering the track/trains/accessories they're made to mingle with.
In this video you can also chuckle a bit at the misspelled BN markings on some of the freight cars appearing later on in the video.
There are more videos on this YouTuber's site if you're curious. In these are further examples of models not appearing in the above linked videos.
---PCJ
