Hi and welcome to HC
Steward is very handsome
You should leave him be for a couple of days, try to keep noise around him down a bit and what have you. He will find his water bottle, food, second part of his cage and everything in good time. They don't drink much or eat a great deal in all honesty.
Just wanted to point something out - his wheel is much, much too small. They only Flying Saucer large enough for a Syrian is the large, 12inch one. Syrian hamsters need wheels that are at least 8inches, even when they are still babies. Small wheels cause serious back problems.
What size are his cages combined? It's hard to tell from the video but the one he was in in the video looked exceptionally small, certainly if he is still a baby and not fully grown yet (as in comparing him to the cage if you see what I mean).
I wouldnt worry about him not having a nest box (at least not finding it for a while), a lot of hamsters will have open nests instead of using proper houses (typical! I've tried five different types, Luna prefered an open nest until I gave her a cardboard box lol).
Good luck with him, doesn't sound like you will need any taming tips!