Assets\USharpVideo\Scripts\USharpVideoPlayer.cs(1484,21): error CS0234: The type or namespace name 'IsValid' does not exist in the namespace 'Utilities' (are you missing an assembly reference?)

[ShreddzGaming]

New to unity and world creation. I've Tried looking for other answers and deleting and reimporting the SDK, Udon Sharp, and USharpVideoPlayer.

[MerlinVR]

Make sure you don't have shadergraph in the project, it conflicts.

[ShreddzGaming]

That worked, thank you so much! Sorry for the late reply.