Okay, these videos have a lot of stupid and annoying sound effects worked in, but they often have legitimately amazing footage, such as that spider snatching an ant out of midair.
Funny coincidence: I saw that footage as an animated gif free of context compared the anime Attack on Titan/Shingeki no Kyojin (basically saying it was an accurate description of it).
Having watched a fair bit of said anime (free on Crunchyroll), I have to say that yeah, it kind of is. (Note: Attack on Titan is fantastic, but it's also disturbing, violent as heck, and emotionally wrenching. Fair warning.)