Update server/videoSync.ts to include database connectivity checks, batch processing for videos, and error counting to enhance the robustness of the video synchronization service. Replit-Commit-Author: Agent Replit-Commit-Session-Id: 890577b1-c154-40a4-a177-a0c6d55320c3 Replit-Commit-Checkpoint-Type: full_checkpoint Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/8cc42625-c1f5-4e43-99bd-77f2c4dedee2/890577b1-c154-40a4-a177-a0c6d55320c3/heEm7CS