Alvin-Zilverstand/return-youtube-dislike
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Add formula used for dislike calculation

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Added Q: How is the dislike count calculated?
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2022-06-07 22:46:26 +05:30
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# Frequently Asked Questions # Frequently Asked Questions
## Before asking a question on GitHub or Discord, please refer to this. ## Before asking a question on GitHub or Discord, please refer to this.
### **1. Where does this extension get the data?** ### **1. Where does this extension get the data?**
A Combination of Google APIs and scraped data. A Combination of Google APIs and scraped data.
We save all available data to our DB for it to be available after Google shuts down dislike counts in their API. We save all available data to our DB for it to be available after Google shuts down dislike counts in their API.
### **2. Video dislike count doesn't update** ### **2. Video dislike count doesn't update**
Right now video dislikes are cached, and aren't updated very frequenly. Once every 2-3 days, not more often. Right now video dislikes are cached, and aren't updated very frequenly. Once every 2-3 days, not more often.
@@ -17,5 +19,23 @@ The extension collects the video id of the video you are watching, fetches the d
### **4. What will happen after the YouTube API stops returning the dislike count?** ### **4. What will happen after the YouTube API stops returning the dislike count?**
The backend will switch to using a combination of archived dislike stats, estimates extrapolated from extension user data and estimates based on view/like ratios for videos whose dislikes weren't archived and for outdated dislike archives. The backend will switch to using a combination of archived dislike stats, estimates extrapolated from extension user data and estimates based on view/like ratios for videos whose dislikes weren't archived and for outdated dislike archives.
### **5. How is the dislike count calculated?**
RYD uses the votes from it's users to extrapolate the dislike count.
- If the video was uploaded after the API was shut down:
$$ RYD \ \ Dislike \ \ Count = ( { RYD \ \ Users \ \ Like \ \ Count \over RYD \ \ Users \ \ Dislike \ \ Count} ) * Public \ \ Like \ \ Count $$
- If the RYD database somehow had the actual like and dislike count (provided by the uploader or from the archive), the dislike count will be calculated based on both - the users' votes and the archived value. The archived value will have less influence on the final count as it ages.
---
This in video form
[![IReturn YouTube Dislike Explained](https://yt-embed.herokuapp.com/embed?v=GSmmtv-0yYQ)](https://www.youtube.com/watch?v=GSmmtv-0yYQ)
---
## I have security / privacy concerns ## I have security / privacy concerns
See [this page](SECURITY-FAQ.md) for more info. See [this page](SECURITY-FAQ.md) for more info.