You can safely delete the "Story" (~12 GB) and "Gallery" (~10 GB) folders located within the TekkenGame/Content/Movies directory if you do not plan to play those modes.
The standard installation of Tekken 7 on PC requires approximately 60 GB of storage. TEKKEN-7-TRNT.rar
Many "repacked" versions (like the one in your .rar file) aim to reduce this download size, sometimes down to approximately 12.36 GB , by removing or highly compressing these non-essential video files. Managing Storage You can safely delete the "Story" (~12 GB)