Bitrate explained.

Bitrate is the amount of data transmitted per second of video, measured in bits per second (bps). Higher bitrate means more data per frame, which means more detail, cleaner motion, fewer compression artefacts. But higher bitrate also demands more bandwidth from both the broadcaster and every viewer. The art of professional broadcasting is finding the lowest bitrate that still looks clean at the viewing resolution. CBA targets 4-6 Mbps for 1080p30 standard streaming, 8-12 Mbps for 1080p60 (sports, esports), 25-50 Mbps for 4K delivery, and 3-5 Mbps for low-latency SRT contribution feeds where bandwidth efficiency matters more than peak quality. Bitrate interacts with codec efficiency: H.264 at 5 Mbps looks worse than H.265 (HEVC) at 3 Mbps. It interacts with frame rate: 60fps needs roughly 50% more bitrate than 30fps for the same perceived quality. And it interacts with the encoder strategy (see CBR vs VBR) because constant bitrate behaves differently than variable bitrate under motion.