Unicorndy
Unicorndy
Hi, I have the exact same problem. No preview video player and can only use one track. 
I have check the console, no error reported and no multi-track enabled. 
Interested in this feature as well, hopefully we can see an update soon!
It seems like the fit do not save the indexing of the features according to the docstring. So when I perform the transform on test and validation dataset, the mapping...