I figured it out, needed to restart the webserver to pick up the change.
Yes, any changes to the webserver configuration must be reloaded to take effect.
As for large files, I have modified ubb to accept mp4's, and other video formations, and run them through AWS MediaConvert for streaming transcoding and packaging. All the content is then on S3, which I have as a mounted file system. I have it set for 500mb.
I am running on AWS LightSail, 2.50-5 dollars a month for the instance and 15-20 per month for storage. We run a lot of pictures and video, about 10Tb which are mounted on S3 storage. Very nice performance at very low costs. The only setup issue with a fresh forum is you have to manually go in and set a lot of file/directory permissions. I have a cloud AMI image if anyone wants it that has the forum already built, just have to create an instance from the image.
That's actually a pretty interesting setup; I'm glad to see someone taking an out of the box solution and making it their own.