Fix AudioManager memory leaks and replace broken video URLs in demo files#4165

CarGuo merged 7 commits intomasterCarGuo/GSYVideoPlayer:masterfrom

copilot/fix-72a4a75a-91b6-4756-aede-a4895ad60785CarGuo/GSYVideoPlayer:copilot/fix-72a4a75a-91b6-4756-aede-a4895ad60785Copy head branch name to clipboard