You might be asking, why the hell not? Here's an explanation as to why.
Before 2011-2013, there were many poor options when it came to rendering Flash animations. The then named Adobe Flash had their old .AVI, .MOV, and image exports (Which I'm pretty sure TV studios used this option). However, these did not work well with ActionScript and Movie Clips. What's worse, the .MOV exports had frame drops depending on the animation. Sure there was external .SWF converters at the time, though all it did was screen record the video which resulted in numerous frame drops. Not to mention, logos if you didn't pay for the converter.
Enter Kurst's SWF Renderer and Swivel. Developed in 2011 and 2013 respectively, both of them supported Movie Clips and ActionScript. Plus, there was absolutely no frame drop in both software. Swivel is completely free, however Kurst's SWF Renderer was not (their older version was).