In its entirety, it displays various screenshots of Reddit degringolade, while rock song Within Temptation - Mad World plays in the background.
It spans a few minutes, maybe.

For reference, it has been previously posted on /wsg/. Multiple times.
archived.moe/wsg/thread/4158518/#q4158548
archived.moe/wsg/thread/4186604/#4186610
archived.moe/wsg/thread/4132258/#4132260
archived.moe/wsg/thread/4132258/#4132260
archived.moe/wsg/thread/4515974/#4524193
archived.moe/wsg/thread/4479196/#q4480153
Hope that helps.