The herd is going to be thinned, and consolidation among the plethora of SVoD and AVoD providers is inevitable. A number of small cracks have formed this past week, and similar tremors are being seen in the studios that churn out the video that feeds this nascent segment. A seismic event looms, and throw Covid-19 into the mix, and you can hear the faint sound of HR departments across the industry sharpening their blades. WarnerMedia is the best place to start, as the AT&T subsidiary has begun its latest round of layoffs, which are thought to encompass some 600 positions. Senior positions didn’t escape the bloodshed, including the CFO, the Worldwide Television Distribution president, and the Worldwide Theatrical Distribution EVP.…