>>58844048CCV is how many people are watching your thingy as it streams or premieres. Views is how many click it and watch it for some length of time, both during it streams and afterwards.
Both are modified by YT verification and culling algorithms in real-time and in post processing.
What impacts the size differences? Temporal fanbase distribution, algorithm luck, thumbnail appeal, stream title, game choice, the weather in major population centers related to your primary audience, the patch that YT's coders have shat out that agile sprint, etc. etc. and on and on.
