Popular videos, playing from mp4

Model/Video.swift

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+import Alamofire
+import Foundation
+import SwiftyJSON
+
+class Video: Identifiable, ObservableObject {
+    let id: String
+    var title: String
+    var thumbnailURL: URL
+    var author: String
+
+    @Published var url: URL?
+    @Published var error: Bool = false
+
+    init(id: String, title: String, thumbnailURL: URL, author: String) {
+        self.id = id
+        self.title = title
+        self.thumbnailURL = thumbnailURL
+        self.author = author
+    }
+
+    init(_ json: JSON) {
+        id = json["videoId"].stringValue
+        title = json["title"].stringValue
+        thumbnailURL = json["videoThumbnails"][0]["url"].url!
+        author = json["author"].stringValue
+        url = formatStreamURL(from: json["formatStreams"].arrayValue)
+    }
+
+    func formatStreamURL(from streams: [JSON]) -> URL? {
+        if streams.isEmpty {
+            error = true
+            return nil
+        }
+
+        let stream = streams.last!
+
+        return stream["url"].url
+    }
+}