My instructor had several old T'ai Chi books in Chinese, full of descriptive calligraphy and illustrations or photographs of movements. He knew only a smattering of Chinese, but he'd pour over the images. It was his way of learning how the old masters did T'ai Chi, which in turn he'd teach us.
It may not be easy at all to study T'ai Chi from a sequence of images. Certainly it's commonplace to recommend that you attend a class and follow the teaching, that is, in person. Nevertheless, studying images can stretch your learning "muscles," and ultimately strengthen and sharpen your T'ai Chi.