There are like apps that are built on Steemit (Steem). So, they had Dlive which has live-streaming. But Dlive then left Steem. Now, one app is called Dtube. That does not have streaming right now. There are different websites (apps) that branches from Steem which is like the roots of the tree. Now, right now, I cannot find any current live streaming video apps for Steem. They do have apps like Dtube for example and a few others. In other news, there is also Bitchute, Brighteon, etc. Now, there are also competitors to Steem, including blockchain networks like Bear Shares, Serey, Weku, Dream Real, etc. But Steem came out before they did. Steem also competes with Minds, Gab, etc. Now, video hosting and live streaming is harder to do on blockchains. Not impossible. But tougher. Decentralizing video hosting is an ongoing project that people are working on as they try to compete with YouTube.