How does live streaming actually work?
Your video is captured, compressed, sent to a server, re-encoded into several qualities, and distributed to viewers — a chain that explains both the delay and most of the problems streamers encounter.
The pipeline:
Capture and encode. Software combines camera, screen and audio, then compresses the result. Encoding is the expensive step — done on the CPU for quality or on the GPU's dedicated hardware encoder for lower system impact.
Ingest. The stream is sent to the platform's nearest ingest server over a protocol that tolerates imperfect networks.
Transcoding. The platform re-encodes your single stream into a ladder of qualities, so viewers on poor connections can watch a lower one. This is a substantial cost, which is why some platforms restrict transcoding for smaller channels — and why viewers may be forced to your source quality or nothing.
Delivery, through a content delivery network in segments, with each viewer's player choosing a quality continuously.
Why there is a delay. Every stage buffers. Typical latency runs from a few seconds to half a minute. Lower latency means smaller buffers and more stutter, which is the trade-off behind "low latency mode". It is also why live sports spoilers arrive from social media before the picture.
What actually causes streaming problems:
Upload bandwidth, which is far lower than download on most connections and is the usual constraint.
Bitrate set too high for the connection, producing dropped frames.
Wi-Fi, where a single interruption is visible. Ethernet solves more streaming problems than any setting.
CPU contention between the game and the encoder.
The non-technical half. Live moderation is genuinely hard because there is no review before publication: platforms rely on trusted moderators, automated word filters, follower-age and account-age restrictions on chat, and slow modes. Raids, hate raids and coordinated chat abuse are the specific risks, and preparing moderation before you need it is the standard advice.
Monetisation runs on subscriptions, direct tips, advertising and brand deals, with platform revenue shares varying widely and payout thresholds worth checking.