Is it advisable to learn Tai-chi exercises by watching videos?

Is it advisable to learn Tai-chi exercises by watching videos alone? with out going to a teacher?|||You can, but like any exercise, martial art, practise, etc you may not the the form as properly as learning in person.|||No. Unless you have had prior training with good tai chi (at least 10 years) you cannot learn properly from a video. You WILL have incorrect body alignment and you WILL injure your joints - most likely your knees. You need proper correction and constant re-alignment with a properly trained and certified instructor to learn tai chi (or anything like it) well.