Data in Tensorflow Video

in the video at 8:56, the output of the matrix was (1,3) , but in previous videos it was (3,1), as if

Weight matrix (W): (3, 2)
Input matrix (X): (2, 1)
Result of multiplication (WX): (3, 1)

Why does Tensorflow give this output? Does it transpose the 2 matrices ?

The orientation of the W matrix and the product can vary somewhat between assignments. There is no universal agreement on the shapes.

Be prepared to use a transposition as necessary.