Added tags model

YTManager/Models/Tag.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using System.ComponentModel.DataAnnotations;
+
+namespace YTManager.Models
+{
+    public class Tag
+    {
+        // Uniquie ID for this media type
+        [Key]
+        public long key { get; set; }
+
+        // Tag Name.
+        [Required]
+        public string Name { get; set; }
+
+        // Videos this tag applies to.
+        public List<Video> Videos { get; set; }
+
+        // Channels this tag applies to.
+        public List<Channel> Channels { get; set; }
+    }
+}