Videoplayer support for visionOS

[from2001]

I will implement a Videoplayer helper script to

• [x] make Videoplayer component available on visionOS.
• [x] check Videoplayer component uses RenderTexture on visionOS. Alert if not using RenderTexture.
• [x] call Unity.PolySpatial.PolySpatialObjectUtils.MarkDirty() for the RenderTexture if PolySpatial is installed.
• [x] cache a video file if the source is URL and WebRequest_VisualScriptingNodes package is installed.
• [ ] Display the description of the script on the inspector, such as the feature of the visionOS support, caching feature etc.
• [ ] ~~Display fix button on the inspector to solve the requirement issues. ~~
• [ ] Add RequireComponent to the script

The VideoPlayerHelper script is intended to be attached to the same Gameobject which has a VideoPlayer component.

[from2001]

Code will be committed on the brunch of https://github.com/styly-dev/STYLY-visionOS-Plugin/tree/issues/41_VideoPlayerSupport

[from2001]

The feature is now implemented and working fine. I also added samples for the usage with a free movie file.

[from2001]

Videoclip doesn’t work with AssetBundle on visionOS. I posted it to the Unity discussion forum.

[from2001]

Videoplayer support is released https://github.com/styly-dev/STYLY-visionOS-Plugin/releases/tag/v0.1.5

[ku6ryo]

We do not do the rest of the tasks. (the dashed tasks in description)