Each video 3-5 mins end up being approximately 5-7gb. Whenever I upload them to YouTube and use Keepvid.com to download the MP4 version of the video, it ends up being under 100mb and the quality seems to be almost identical, I personally don't see a quality loss. I do have to admit that it only allows up to max 720p downloads, while I render in 1080p but still. A good quality 1080p MP4 file shouldn't be over 500mb.
I am lost, and I hope anyone can advise me a better render setting. Much appreciated!