Any decentralized solution that needs more than 1 Mbps continuously sounds terrible! And the main problem I have with anything decentralized is that it won't work in a browser, you'll need to install software and download everything. Those drawbacks are probably the reason why it isn't used on a large scale. I wouldn't mind downloading 100+ GB on my desktop, but for mobile users, decentralization is almost impossible.
And even if you get that working: how are you going to download it to get started? Centralized on Github?
Most of the things that claim to be decentralized, aren't decentralized.

Say what?