tweek the pytube json producer, handle empty string better.
tweek the pytube json producer, handle empty string better.

CarlFK/veyepar,CarlFK/veyepar,CarlFK/veyepar,CarlFK/veyepar,xfxf/veyepar,xfxf/veyepar,xfxf/veyepar,xfxf/veyepar,xfxf/veyepar,CarlFK/veyepar