I lived in Bangkok for 6 months and love the city. I lived in Banglamphu (don't ask me what possessed me to live there) and am pretty familiar with Phra Nakhorn.
A) The white and blue bus plies only Hat Yai to Phuket. It would take them about 9 hours out of the way. I think that's just creative editing. There are direct buses non-stop to Bangkok Sai Tai Mai Station (actually SW of the BKK suburb of Thonburi, but still BKK Metro area). A VIP bus non-stop from Phuket to Sai Tai Mai is the fastest way to Bangkok.
B) The temple is nowhere near BKK. BKK is inland. It's probably on Phuket Island.
C) The elephants MAY be Khao Yai. That's quite a hike from BKK. .
D) Pic 27 in Reply 26 is 100% sure Ekamai Bus Station off of Sukhumvit Ave in Downtown BKK. Buses going to Khao Yai leave from Mo Chit on the North Side.
E) Pics 7-10 in Reply 5 is 100% on Phra Nakorn Island (which is Khao San Road/Grand Palace/Wat Pho/UN Building) or Dusit (the Government District). The dead giveaway is the Tuk-Tuk in pic 8, which are banned outside of Phra Nakorn and Dusit (technically they're not allowed in Dusit, but sometimes they get away with it). Also, you might get a better idea by the red placard on pic 8. The placard is a campaign poster for the (now-ruling, then-challenging) Puea Thai Party. I don't read Thai, but sometimes it listed the local constituency candidates (which would tell you what district/location you were in), sometimes it listed election promises (like free tablet computers to students, promoting national reconciliation, etc). I think it looks like a platform/promises placard. The architecture of the buildings is another dead giveaway.
F) Pic 8 is across the street from the Grand Palace's East Wall, looking north. Definitely. That cross street is Thanon Saranrom, the street to the side is Thanon Saranchai. --- this I'm going to step away from after looking at Google Maps. The guardrail is throwing me off. But it IS Phra Nakhorn. That is definite. And I've been there before several times and it bugs me that I can't remember. That style of park is odd in Bangkok (with the trimmed hedges and tightly mowed grass) and it would be the style favored by the Royal Family.
G) Pic 9-10 are near Bangkok City Hall. This I'm less sure of though.
H) Pic 20 in Reply 26 I think is Thanon Pitsanulok across the street from Royal Turf Club of Thailand, close to the intersection with Thanon Nakhon Sawan.