Thanks to LaoTicket Service one of our subsidiary services, They have made a video regarding the Self Check in Kiosks and Baggage drop off in Changi Airport, Terminal 4 (Singapore)
Changi Airport Terminal 4 is one of the most automated airport around the world and the gadgets may be a little bit overwhelming if you do not know how to use them. The below video is in Lao but there is english subtitle there, ready to teach you how to use these machines.
AirAsia automated check-in systems may be different from place to place and This tutorial is strictly for Changi Airport, Terminal 4 Only. Other international Airasia hubs such as KLIA2 in Kuala Lumpur uses another type of luggage drop in facility which require you to scan the barcodes with a handheld scanner while in Don Mueang Airport ( Singapore), International flights are mostly being check in by the traditional counters while local flights check in uses the self check in facilities.