What appears as a mundane file name is, in fact, a window into a specific moment in digital media history. The keyword encapsulates a genre (party amateur), a geography (Czech Republic), a demographic (young adults), a technological milestone (early HD), and a distribution style (split-file downloads).
Based on the text provided, the "helpful feature" being referenced is most likely or Video Indexing/Thumbnails . Czech Parties 2 - Part2 -18-20 Years- -2011 HD-