Video taken down after changing title and keywords

Hello,
I'm very new to youtube SEO and I'm trying to figure out a lot of things using trial and error method but there appeared that one thing that was very random. So I noticed that my video that was staying for a pretty long time with the pretty nice amount of views had poor SEO score in vidIQ so I've changed whole title and keywords for it and BOOM it got taken down few minutes after this action. I could've thought that's an accident but I was also uploading another video at the time in…

Video taken down after changing title and keywords