gistfile1.txt

     func transformedVideoURL(_ publicID: String?) -> URL? {
        
        let transformation = CLTransformation()
        transformation?.width = Float(960)
        transformation?.height = Float(540)
        transformation?.crop = "pad"

        guard let _transformation = transformation, let _publicID = publicID else {
            return nil
        }
        
        let options = ["type": "authenticated",
                      "sign_url": "YES",
                       "resource_type": "video",
                       "secure": true,
                       "transformation": _transformation] as [String : Any]
        do {
            let cloudinary = try CLCloudinary(url: Configuration.cloudinaryURL())
            guard let convertedURL = cloudinary?.url(_publicID, options: options) else {
                return nil
            }
            return URL(string: convertedURL)
        } catch {
            return nil
        }
    }
    
    let videoURL =  transformedVideoURL("B03D4E5B06AB63FA8375FF00000B3273/B43D4E5B06AB63FA8375FF00000B3273/pyskfy03rzaz0u0o9469")
    
    print(videoURL)
    //https://res.cloudinary.com/cloudname/video/authenticated/s--8jiINiDJ--/c_pad,h_540,w_960/v1/B03D4E5B06AB63FA8375FF00000B3273/B43D4E5B06AB63FA8375FF00000B3273/pyskfy03rzaz0u0o9469