Update cover image for video upload

generateImages.js

generateImages() {
    let height,
        aspectRatio = Config.aspectRatio.HEIGHT / Config.aspectRatio.WIDTH;

    this.videos.forEach((video, index) => {
      let currentVideoData = this.videos[index];

      if (this.moduleConfig.isPlaylist) {
        currentVideoData = this.videos[index].videoMetadata;
      }

      const IPTCMetadata = currentVideoData.photoVideoMetadataIPTC,
            FMGMetadata = currentVideoData.photoVideoMetadata_fmg;

      // Set defaults
      FMGMetadata['thumbnail'] = FMGMetadata['cover'] = IPTCMetadata.snapshotLinks && IPTCMetadata.snapshotLinks.length ? IPTCMetadata.snapshotLinks[0].link : '';

      if (this.moduleConfig.thumbnails && this.moduleConfig.thumbnails[IPTCMetadata.identifier]) {
        FMGMetadata['thumbnail'] = this.moduleConfig.thumbnails[IPTCMetadata.identifier];
      }

      if (this.moduleConfig.covers && this.moduleConfig.covers[IPTCMetadata.identifier]) {
        FMGMetadata['cover'] = this.moduleConfig.covers[IPTCMetadata.identifier];
      }

      if (this.pageLevelParams.coverOverride) {  
          // Get Image override from cloudinary
        } else {
          if (IPTCMetadata.cloudinaryLink && IPTCMetadata.cloudinaryLink.link) {  
              // get default image from cloudinary
              height = Config.Cloudinary.Sizes.THUMBNAIL_WIDTH * aspectRatio;
              FMGMetadata['thumbnail'] = Utils.formatCloudinaryImage(
                IPTCMetadata.cloudinaryLink.link, Config.Cloudinary.Sizes.THUMBNAIL_WIDTH, parseInt(height)
              );

              height = Config.Cloudinary.Sizes.COVER_WIDTH * aspectRatio;
              FMGMetadata['cover'] = Utils.formatCloudinaryImage(
                IPTCMetadata.cloudinaryLink.link, Config.Cloudinary.Sizes.COVER_WIDTH, parseInt(height)
              );
          }
        }
      }
    });
  }