Based on the total number of views, you are asked to choose the least popular video. Take into account that a user may see a movie more than once, but only one count per unique user view will be counted. In the event of a tie provide all the video ids of the least popular video$($s$).$

Tables Schema as Below:

videos$\_$watched

columnName dataType

user$\_$id VARCHAR$(10)$

video$\_$id VARCHAR$(10)$

watched$\_$at DATETIME