Find the following video title - Welcome to London - Look for the riddles to unusual places to visit in London - in the Puzzle Video Playlist
N 45 27.xxx, w 75 42.yyy
To calculate the final decimals for the North and West coordinates, fill in the blanks in the following sentences found in the video.
North - Established as a hunting ground by Henry VIII in 1536, it was later opened to the public and transformed into a lush sanctuary.
xxx = (#letters) X (digital root) + 585
West - Its towering presence has witnessed centuries of political and national celebrations.
yyy = (#letters) X (digital root) + 74