Great video, all I would say is that as long as you have a couple of days spare the best way to book a ticket is to just go to the station, unless it's a very busy time of year this would be absolutely fine. And just eat the food and snacks on the train...
I'm Vietnamese and I can't tell what kind of dish it is. It might be fusion dish. Pham is a common Vietnamese surname and Chao Long in Vietnamese is intestines porridge which is a pretty popular in Vietnam.
