Question Video Player high GPU consumption (only in build)

GPU: Nvidia GTX 1080

Format .mp4, settings - transcode off, codec auto, bitrate mode high, spatial quality - high, sRGB on.

Video is rendered on Canvas, Raw Image component.
Render Texture settings - 2D, enable compatible color format - yes, color format R8G8B8A8:UNORM, depth buffer at least 24 depth with stencil, enable mip maps false.

Using Play and Stop commands.

The issue only happens in the build, not in the editor.

Any suggestions on why is it causing so many performance issues, and why is the issue happening only when the game is built?

 

Activated v-sync, and now GPU consumption is at 30%, though, that's still high considering this is a high-end GPU.

 

Downgrading Unity to 2020 LTS reduced the GPU usage to 10%.

 

Here is the profiler data, this is before the above solutions were applied. I hope it will help!