Sharepoint Foundation 2010 and Large Media Files?

Question

I have already seen links giving instructions in how to raise the default 50MB upload limit to up to 2GB, but it doesn't seem like a good idea based on all the caveats and warnings about it.
If we need to occasionally allow access to external SharePoint users to files of size much larger than 50MB (software application installation files, audio recordings and video recordings) despite most documents being much less than 50MB (Office documents)
what is the best solution that does not involve using third party external services such as OneDrive, Azure or Dropbox because we must host all of our files on premises.
The SharePoint server is Internet accessible, but it requires AD authentication to log in and access files.
Some have recommended file server shares for the larger files, but the Internet users only have AD accounts that are used to access the SharePoint document libraries, but they do not have VPN that would be needed to access an internal file share.
I have heard of FTP and SFTP, but the users need something more user-friendly, doesn't require anything applications than their browser and that will use their existing AD credentials and we need to have auditing of who is uploading and downloading files.
Is there any other solution other than just raising the file limit to 1 or 2GB just for a handful of large files in a document library full of mostly sub 50MB files?

Answer 1

I had a
previous post about performance impacts on the upload/download of large content on SharePoint.
Shredded storage has got little to do with this case, as it handles Office documents shared on SharePoint, being edited on Office client, and saving back only the differences, therefore, lightening up the throughput.
These huge files are not to be edited, they're uploaded once.
It's a shame to expose this SharePoint Farm on the extranet, just because of a handful of huge files.
Doesn't the company have a webserver on the DMZ hosting a extranet portal ? Can't that extranet portal feature a page that discovers those files intended to be downloaded from the outside, and then, act as a reverse proxy to stream them out ?
Or, it may be a chance to build a nice Portal site on SharePoint.