The reason you see "HD" and "Sound Effect" in the title of these videos is due to the "Soundboard" economy. Professional editors and amateur creators alike search for these high-quality "clean" clips to add to their library of assets. Having a "clean" version (without background music or game noise) allows an editor to layer it into any context, making the meme infinitely versatile. Cultural Impact
Here is an article exploring the rise and impact of this viral audio clip.
: When a prank backfires on the person who started it.