The T3 and T4 series cameras can't record radiometric video at all, but I believe both can record garbage MJPEGs. My T440bx can, but I never use it due to how awful the image quality is.
They're worth getting if you can get them at a low price. The T3 series performs about as well as earlier Exx, the T4 outperforms the Exx in terms of image quality, but not by much. Autofocus is about the same - mediocre, but rather accurate.