There is a large amount of taiji video of widely variable quality on the internet these days. This is a boon to the modern student making it somewhat easier to learn the forms, as long as one does not get bogged down in watching too much video at the expense of training. Also, neuroscience teaches us that watching poor quality movement will make negative impressions on our brains, so please avoid watching videos simply for the purpose of scorning the less proficient!
Here are some videos we like: