Steps to reproduce:
1.Upload a real video 1Gb to the DL (not a fake file since it will be compressed otherwise).
2. From the document library: Download --> It starts downloading straight away, extremely fast, this is ok.
3. Go to Export/Import of this portlet, and create an Export process. Once it finishes, try to download the LAR file generated --> It won't start and you will have the OutOfMemory Error in the server log,