10 years ago…
Taiji skills cannot be attained by practicing things only seen in videos or even live.
Some things have to be passed by teacher (master) to student through physical contact which gives student proper feeling and understanding of body movements.
But one can learn from videos rough choreography of taiji routines.
I encourage beginners to do this because if saves valuable time during learning sessions with the teacher.
In the above video, Practical Methodform recorded two weeks after I had completed learning choreography of the form only using videos (links to this videos in the movie description).