Radio Silence writes "Infringing videos on iFilm could undermine Viacom's case against YouTube. Although it's arguably not a nest of infringement like YouTube, iFilm appears to host more than a handful of videos for which its corporate parent Viacom does not own the copyright. More importantly, Viacom isn't engaging in the kind of proactive infringement identification practices it expects of YouTube, which may cause problems for them in court. 'if Viacom isn't willing to take the same steps with iFilm that it wants YouTube to take with copyrighted content, Viacom may have a harder time making its case before the judge presiding over the case. "It would have some persuasive value with a judge if YouTube says 'look, they're ranting and raving about all this infringement occurring on my site and they're not doing anything about it themselves,'" said copyright attorney Greg Gabriel.'"