I recruit for SFD, the Story and Franchise Development Team here at Blizzard. We work on all the Cinematics. Here are some of the skills we look for...
Programming Languages - Python, C, and C++. Pick an Integrated Development Environment (IDE) appropriate for that language, like PyCharm/Visual Studio Code/CLion/Visual Studio.
Game Engines - Unity and Unreal will help even though we use a proprietary engine.
Other Software Packages - Houdini, Maya, 3dsmax, Substance Designer, Mari, Katana, Nuke.
Operating platforms - Linux and Windows operating systems.
Knowing some standard terms and methodologies in both Linux and Windows would help too. Virtualization, such as VMWare, VirtualBox.