Source: Screenshot of a YouTube video entitled "Holland-America Line World Cruise 1965 Bangkok" at 18 min. 30 sec. Posted by Mackenzie Rough
Three out of the four columns of the bridge can be seen. On top of them is the royal insignia of King Rama V (Chulalongkorn). According to a Bangkok administration officer, one the insignia fell in the water during the dismantlement of the Chaloem Sawan 58 Bridge in 1971. It is not known however whether it has been recovered.
The students on the picture are most likely studying at Thammasat University nearby.