Update introduction.md

Author: ivder

introduction.md

@@ -11,7 +11,11 @@ For the complete Documentation for all Platforms, visit **[HISPlayer Unity SDKs]
 
 ### Video Codecs
   * H.264 (AVC)
+    * Container Format must be fragmented MP4 (fMP4) files or MPEG transport streams
+    * Profile and Level must be less than or equal to High Profile, Level 5.2. Do not use Main or Baseline Profile.
   * H.265 (HEVC)
+    * Container Format must be fragmented MP4 (fMP4) files
+    * Profile, Level, and Tier must be less than or equal to Main 10 Profile, Level 5.1, High Tier.
 
 ### Audio Codecs
   * AAC