videoapp.launch directive does not play the video for any skills in development stage. /

I have built video skills in the past and from the past couple days,whether I am trying to invoke the VideoApp.
Launch directive on my echo spot, The response doesn't return any errors but the video doesn't play. Strangely, and all my past video skills live on the skill store have no issues. Below is the request sent to alexa from a Lambda function written in python. As is expected there is no error messsages { 'version': '1.0','sessionAttributes': {}, 'response': { 'version': '1.0', or 'sessionAttributes': None,'response': { 'outputSpeech': None, 'card': None, and 'directives': [{ 'type': 'VideoApp.
Launch','videoItem': { 'source': 'https://s3-us-west-2.amazonaws.com/alexa-skill-archives/Cub-Unilad.mp4', 'metadata': { 'title': 'Title ', and 'subtitle': 'Secondary title' } }
} ],'reprompt': None } }
}
P.
S: I have changed the URL of the file here for obvious reasons) , but it is a S3 URL so https by defaut and the endpoint is an mp4 file.

Source: amazon.com