It would seem that these days anything can become the number one trending video, over on YouTube, even if you can't quite work out how they ended up there. That being said there are countless videos that make their way to the top spot, most recently one of those being the video from a YouTuber named Jun who shows how he transformed a rusty looking knife into something that looks brand new!
Although you wouldn't think a knife transformation would make it's way onto the trending tab on YouTube it has to be said that it's incredibly satisfying to watch, which is probably why it's been watched by more than 4 million people in just a few days.
The video shows a traditional Japanese knife that he bought for $3 before he sets about restoring it to its former glory. Once he's done he demonstrates how much sharper it is than a normal knife you can buy in your average shop and it's impressive to say the least.