Is 100 mbps down - 5 mbps up and a 1 terabyte internet good enough for gaming, youtube, stream, ect?

Where are you getting these numbers? I have 1 mbps down and I can watch a youtube flick at the same time I download two others. Most people think they have super high speed service at 15 mbps. And WTF does "a 1 terabyte internet" mean? I suspect you meant "a 1 terabyte hard drive".