You rarely need to download Vulkan runtimes manually. They come bundled with your graphics drivers. If a game asks for Vulkan, update your GPU drivers first . Only hunt down version 1.0.65.1 if you are maintaining a very old system or software.
The Vulkan Run Time Libraries 1.0.65.1 can be downloaded from the official LunarG website or other reputable sources. The installation process is straightforward and involves executing the downloaded installer package. vulkan run time libraries 1.0 65.1 download