This has happened twice this week . The first video taked down had over 16 million views. As soon as I flagged a couple of comments for spam , my video that has existed for 1 and a half year got taken down. 5 mins ago another video that was getting around 2500 views daily got taken down as soon as I flagged a couple of comments as spam!? Could it be a bug in YT system that reads comments getting flagged as spam as your video getting flagged as spam. Feeling depressed right now btw the videos were against YT TOS but they remained fine as long as I didn't flag other peoples comments. Edit: The first video, I actually approved more spammy comments but did flag comments but only 2.