fix broken tests (#23680)
fix broken tests (#23680)

Tests were failing due to the "404 Error" Response from an API that fetches specific asset (video transcript data) from YouTube.

I have changed it by using a mocked API response instead of direct API call to the Youtube server.

Edraak/edraak-platform,Edraak/edraak-platform,Edraak/edraak-platform,Edraak/edraak-platform