You can find a large number of free recordings of privates in the thread "Recordings of privates from Ruscams.com and Video-girl.ru" on the forum of the upskirt-peepers site.
Anyone who wants to can post links to recorded privates of sex videochat models in this forum thread. The links, unsurprisingly, lead to free file hosting services (depositfiles, letitbit, rapidshare) with all the pros and cons that come with that. According to the thread's rules, links must be accompanied by screenshots from the videos, which is very handy and lets you get a sense of what the private you've painstakingly downloaded actually looks like (though not everyone follows this rule, the overwhelming majority of links do come with screenshots).
The thread is completely free to browse for anyone interested. Right now it already has 18 pages, with about 10 video recordings per page. As an experiment, I downloaded a few clips, including: the newest one, the oldest one, and a few chosen at random from the middle pages. All the privates downloaded fine, played normally, and fully matched their descriptions and screenshots.
The forum thread has recordings of privates from both currently active sex videochat models (Kamelia, Kapriz, Avalanche, скромняшка, FetishWoman, Bellsky, Alinna, CrazyDaisy, Mar999999, PunkGirl, HotLoveSexy), and models from years long past. Available are a lesbian private, a bathtub private, a recording of a model in the shower (though very short), and even a couple recording where a guy fucks his girlfriend.
The average length of the clips is 2-3 minutes. The shortest is 15 seconds, and the longest private recording I managed to find runs 15 and a half minutes. File sizes range anywhere from five hundred kilobytes to a hundred megabytes.
The quality of the recordings, in most cases, can be described as "not great." Most of it was scraped from Video-Girl. All available privates are posted regardless of how interesting they are, so a lot of the videos are frankly dull filler, but there are also some genuinely explosive clips in there too.
Bottom line: a large number of clips, download via free file hosting services, low video quality, plenty of downright weak privates, screenshots provided.
Where to find free recordings of model privates? (part 1)
Where to find free recordings of model privates? (part 2)
Where to find free recordings of model privates? (part 4)
New Video-girl model: Plush Mikhei
Girls will be girls
New Video-girl porn videochat model: SexiestHelen
Changes to the most complete list of sex video chats