Bangkok Sukhumvit Walking Tour in 4K

I have walked from Terminal 21 at Ason on Ason Montri road all the way to Asok Pier by the river. I took the scheduled public transport boat all the way to Pratunam Pier where I got on the skywalk crossing Gaysorn Village. From Gaysorn village I walked back to Terminal 21 on Sukhimvit road.