app.ts

// entities/video/index.ts
type IVideo = {
  src: string;
}

const getVideoSrc = (video: IVideo): number => {
  return video.src;
}

const setVideoSrc = (video: IVideo, src: string): number => {
  return { ... video, src };
}


// redux/entities/index.ts
type IEntitiesState = {
  videos: IVideosState;
}

// redux/entities/video/index.ts
type IVideosState = {
  [key: number]: IVideo;
}