refactor: 删除部分多余的代码和注释

src/video/types.rs

@@ -0,0 +1,22 @@
+//! Re-exports of shared video types used by other modules (e.g., webrtc)
+//!
+//! External modules should import from `crate::video::types` instead of
+//! reaching into internal submodules directly.
+
+// From video::format
+pub use super::format::{PixelFormat, Resolution};
+
+// From video::frame
+pub use super::frame::VideoFrame;
+
+// From video::encoder (codec-level types)
+pub use super::encoder::{BitratePreset, VideoCodecType};
+
+// From video::encoder::registry
+pub use super::encoder::registry::{EncoderBackend, VideoEncoderType};
+
+// From video::shared_video_pipeline
+pub use super::shared_video_pipeline::{
+    EncodedVideoFrame, PipelineStateNotification, SharedVideoPipeline, SharedVideoPipelineConfig,
+    SharedVideoPipelineStats,
+};