What Actually Causes Buffering in Video Streaming? A Practical Look at the Network Stack When a video stream starts buffering, the first thing most people check is their internet speed. If they have 100 Mbps, 300 Mbps, or even 1 Gbps, they assume buffering shouldn't happen.
Source: [Dev.to](https://dev.to/bilal_elabbadi_c5f7287dd0/what-actually-causes-buffering-in-video-streaming-a-practical-look-at-the-network-stack-28mb)