feat(lib): update video class member nullability

Author: ThibaultBee

lib/src/types/video.dart

@@ -41,19 +41,19 @@ class Video {
   final String videoId;
 
   /// When a video was created, presented in ISO-8601 format.
-  final DateTime? createdAt;
+  final DateTime createdAt;
 
   /// The title of the video content.
-  final String? title;
+  final String title;
 
   /// The description for the video content.
-  final String? description;
+  final String description;
 
   /// The date and time the API created the video. Date and time are provided using ISO-8601 UTC format.
-  final String? publishedAt;
+  final String publishedAt;
 
   /// The date and time the video was updated. Date and time are provided using ISO-8601 UTC format.
-  final DateTime? updatedAt;
+  final DateTime updatedAt;
 
   /// The date and time the video was discarded.
   final DateTime? discardedAt;
@@ -62,7 +62,7 @@ class Video {
   final DateTime? deletesAt;
 
   /// Returns `true` for videos you discarded.
-  final bool? discarded;
+  final bool discarded;
 
   /// Returns the language of a video in [IETF language tag](https://en.wikipedia.org/wiki/IETF_language_tag) format.
   @_JsonLocaleConverter()
@@ -72,50 +72,49 @@ class Video {
   final LanguageOrigin? languageOrigin;
 
   /// One array of tags (each tag is a string) in order to categorize a video. Tags may include spaces.
-  final List<String>? tags;
+  final List<String> tags;
 
   /// Metadata you can use to categorise and filter videos. Metadata is a list of dictionaries, where each dictionary represents a key value pair for categorising a video. [Dynamic Metadata](https://api.video/blog/endpoints/dynamic-metadata) allows you to define a key that allows any value pair.
-  final List<Metadata>? metadata;
+  final List<Metadata> metadata;
 
   /// The source information about the video.
-  final VideoSource? source;
+  final VideoSource source;
 
   /// The details about the video object that you can use to work with the video object.
-  final VideoAssets? assets;
+  final VideoAssets assets;
 
   /// The id of the player that will be applied on the video.
   final String? playerId;
 
   /// Defines if the content is publicly reachable or if a unique token is needed for each play session. Default is true. Tutorials on [private videos](https://api.video/blog/endpoints/private-videos).
-  @JsonKey(name: '_public')
-  final bool? public;
+  final bool public;
 
   /// Defines if video is panoramic.
-  final bool? panoramic;
+  final bool panoramic;
 
   /// This lets you know whether mp4 is supported. If enabled, an mp4 URL will be provided in the response for the video.
-  final bool? mp4Support;
+  final bool mp4Support;
 
   /// Creates a [Video].
   const Video(this.videoId,
-      {this.createdAt,
-      this.title,
-      this.description,
-      this.publishedAt,
-      this.updatedAt,
+      {required this.createdAt,
+      required this.title,
+      required this.description,
+      required this.publishedAt,
+      required this.updatedAt,
       this.discardedAt,
       this.deletesAt,
-      this.discarded,
+      required this.discarded,
       this.language,
       this.languageOrigin,
-      this.tags,
-      this.metadata,
-      this.source,
-      this.assets,
+      required this.tags,
+      required this.metadata,
+      required this.source,
+      required this.assets,
       this.playerId,
-      this.public,
-      this.panoramic,
-      this.mp4Support});
+      required this.public,
+      required this.panoramic,
+      required this.mp4Support});
 
   /// Creates a [Video] from a [json] map.
   factory Video.fromJson(Map<String, dynamic> json) => _$VideoFromJson(json);