Ok, I don't watch much online media, I stick to streaming services (thankful that my wife works to afford them <3 )It's not that people are confusing the two, it just has to do with the popularity of the concept of 'Abridged Series' on the internet.
Which is basically just where you take a popular TV series or movie or whatever and you do abridge it by shortening it considerably from its original length but you also redub it as a parody of itself and good-naturedly poke fun at whatever it is your abridging.
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I can see that being an online thing. Which puts it smack in the middle of popular culture, thus popular lexicon.
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Still, it would be technically a voice-over parody of an abridged work.