Tell you what, let's try a fun little experiment. Think you guys are gonna love it! All you need to do is go to the AP sound video, a link to which dann thoughtfully provided above.
Listen to the clip at full speed. You'll probably say you can hear a "trilling", although very fast, in it. You might say it sounds like the cricket recording has just been sped up, since the "trilling" in the AP video is quite noticeably "faster" than the trilling you hear in the cricket clip.
So, here's the experiment. At the bottom of the YouTube video, you'll see a little gear icon - the settings button. Click it, and you'll be able to choose the speed of the video's playback (and thus its audio). Go ahead and play the AP video at 0.5 speed, and take note of what you hear. OMG...that's weird!
And then do the opposite - play the clip at X2 speed, and take note of what you hear. Wait, what???
For those too lazy to play along (or who simply won't because they've already decided it's crickets), you may notice that if you play the AP video at half speed or double speed, the sound doesn't actually change, compared to the normal speed. At all. The sound is absolutely identical - up to and including the speed of the "trilling" you hear in it.
But how is that possible? It's possible because what you interpret as a "trilling", isn't. It's a harmonic. Now I could go into a big long description of what a harmonic is, but I'm sure you can handle looking all that up yourself if you're interested. The important thing is, this effect can't be reproduced in an audio clip of crickets (I'll let you try that part out for yourself, too). That's because cricket sound is a literal trilling; it's mechanically produced, by the cricket vibrating a dedicated body part. When you play a recording of cricket sound at half speed, the vibration happens half as fast, and there's no way to avoid hearing that. Opposite effect can be heard by playing the recording twice as fast.
Now sadly, the link dann provided did not include a YouTube video, and the soundbar on the page does not have playback settings integrated into it. So, you'll have to go to YouTube and find a clip of cricket sounds - or else download the sound from his link and try it on some software on your computer that gives you those options.
Basically, this experiment demonstrates that the sound in the AP clip isn't mechanically produced (i.e., made by a physically vibrating object in the environment).