YouNow (founded 2011) allowed anyone to “go live” instantly. At its peak, it attracted a global audience, including a significant user base from Russian‑speaking countries. The phrase can be deconstructed as:

By 2017, YouNow migrated to (MSE/EME) and WebRTC for lower latency. The “live flash” term then evolved from a technical requirement to slang for an unexpected viral moment:

Since you requested — I will assume you want a short analytical / explanatory paper on: