God I wouldn't like to see that (even if I will maybe buy this if it's great when it releases)
I don't think Steam will be available on this console so we will have to wait a full console release (that takes time). And it's not the kind of game you can "get into it fast and stop fast" like a Mario or else. Imagine launching a long combat and have to do it in many segments because of "train" etc...
And for your information, Skyrim isn't confirmed at all on Nintendo Switch, it's the big joke about it, Bethesda said it himself : "there is absolutely no plan to release Skyrim on Switch for the moment"
That launches questions about the Nintendo Switch video... If Skyrim isn't supposed to be there, is this a montage ? You can also see a new Mario and a new Mario Kart on it (slow the video) but maybe it's a montage too and created videos to make people believe the Switch already have many games ready ?