What is the gesture called where you put a fist in a flat hand and slightly shake it to show gratitude? Here is an example: https://youtu.be/cB59VmnK52I?t=15m47s
Do you have any other examples where it is still used today?
作揖 has 3 variations. One is hold your fists, the other is touch your fists with your palm. The last one is the typical 作揖.
Nowadays, only A and B are still used.
Their usages are roughly same, for greeting, appreciation, say goodbye...
The differences are B is prefered by martial arts people, A is a gesture which anybody could use, C is a traditional gesture used by scholars.