Yes, a lot of bandwidth used is from streaming by cord-cutters from major sites like Netflix. But a lot of the video streaming is also from small producers host

Yes, a lot of bandwidth used is from streaming by cord-cutters from major sites like Netflix. But a lot of the video streaming is also from small producers hosting on YouTube or streaming on Twitch and elsewhere. Anyway, all that streaming from major players isn't preventing use of the Internet for other purposes. One concerning change caused by those major players is not with the ISPs but in the browsers, with the adoption of DRM in web standards. It has started with blocking unapproved access to video but could creep into any kind of content, including text.