Users try to control the video platform’s algorithm by giving content a thumbs-down, but Mozilla researchers say it’s not so simple.
YouTube says its systems are working as they’re meant to. “Mozilla’s report doesn’t take into account how our systems actually work, and therefore it’s difficult for us to glean many insights,” says YouTube spokesperson Elena Hernandez, who added that viewers are given control over their recommendations. This includes “the ability to block a video or channel from being recommended to them in the future.
Jesse McCrosky, a data scientist working with Mozilla on the study, says that isn’t entirely clear from YouTube’s public statements and published research about its recommender systems. “We have some small glimpses into the black box,” he says, which show that YouTube broadly considers two types of feedback: on the positive side, engagement, such as how long users watch YouTube and how many videos they watch; and explicit feedback, including dislikes.
Confusion over the intended functionality of user inputs is a key theme of the second part of Mozilla’s study: a subsequent qualitative survey of around one-tenth of those who had installed the RegretsReporter extension and participated in the study. Those that Mozilla spoke to said that they appreciated that inputs were directed specifically at videos and channels, but that they expected it to more broadly inform YouTube’s recommendation algorithm.
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