Answer

test.swift

class DisplayNode: ASCellNode {
    
    lazy var videoNode: ASVideoNode = {
        let node = ASVideoNode()
        node.backgroundColor = UIColor.gray
        node.shouldAutoplay = true
        node.shouldAutorepeat = true
        node.muted = true
        return videoNode
    }
  
    override init() {
        super.init()
        self.automaticallyManagesSubnodes = true
      
        guard let url = URL(string: "https://www.radiantmediaplayer.com/media/bbb-360p.mp4") else { return }
        let asset = AVAsset(url: url)
        self.videoNode.asset = asset
    }
    
    override func layoutSpecThatFits(_ constrainedSize: ASSizeRange) -> ASLayoutSpec {
        return ASInsetLayoutSpec(insets: .zero, child: videoNode)
    }
}