This is the most important movie ever made about Thailand, made in 1979 for the BBC and first broadcast in 1980. It made me reallllly appreciate the love the Thai people have/had for their Royal family. The real power in Thailand rested in their King Rama IX, who reigned for more than 70 years and earned huge respect from his people, long before he passed away one day before my father passed on in October 2016. I saw this film after I had already been to Thailand, but I think it would be a good one for anyone to watch before actually going to Thailand for a visit.
If you've ever eaten at any Thai restaurants in America, you have likely seen framed pictures of the royal family.
Image of King Rama IX from Wikimedia.