Reseller accounts (setup with WHM/CPanel) are accounts that can manage multiple CPanel accounts.
Multiple reseller accounts are usually hosted on a VPS or dedicated server and have less resources and priority than a VPS.
The most important feature for video streaming is rtmp server connectivity.
We recommend servers with dedicated 100Mbps or 1000Mbps ports in well connected data centers (that have gigabyte connections with several providers).
Usually reseller hosting providers don't include rtmp hosting due to management and resource allocation hassle.