I haven’t seen it myself, but I’d assume so. What you’re better off doing is reading the documentation and checking out the example content. You can learn even more for free that way and it’s easier to learn as you can start / stop whenever you like.
While the techniques are still relevant, it will be really confusing at first trying to convert the UDK materials to UE4. UE4 uses a “left to right” flow for the node graph, while UDK uses “right to left”. There are also differences in what you can do since UE4 has the new PBR material workflow, with UDK using the diffuse/specular phong style materials.
There are many great free tutorials on youtube for advanced materials so long as you know what you are looking for, or if you don’t have a look through list of community tutorials. They are not all related to materials, but there is quite a few good ones in there to get you started.