Note: I have verified this claim myself, and it is accurate.
From the archive:
Current screenshot just taken by me:
Conclusion: Over 1,000+ dislikes removed.
Additionally, the video is now unlisted.
Note: The dislike removal could be much higher as they
could also have removed dislikes in smaller batches before,
after, and during as well.
Link to the video:
Disclaimer: This content does not necessarily represent the views of IWB.