The pen that turns at the beginning and the pen that writes at the end are not the same. This is not made by the original video, but spliced.

The words on the last paper are also artificially added (by drawing software).

The female star in the signature can also be changed to anyone you like at will. I have seen Yang Mi, Song Hye Kyo and other versions. (These clips can be taken from any suitable movie or advertisement)

Which clip does the landlord want to know?