@vaartis
didn't knew about redirect url for channel tbh
Explanation of how this works: It's making use of 2 channels, 1 with a username of 666 and another with a username of watc. When you remove h from the url, it can't parse the query string (the part after the ?) anymore, as it's a query string for the watch url. So instead, it tries to open the profile with the name watc. YouTube channel settings allows you to set a redirect URL for a specific channel, so what this user has done is have the channel of watc redirect to the video uploaded by user 666. That's it really.
didn't knew about redirect url for channel tbh
Explanation of how this works: It's making use of 2 channels, 1 with a username of 666 and another with a username of watc. When you remove h from the url, it can't parse the query string (the part after the ?) anymore, as it's a query string for the watch url. So instead, it tries to open the profile with the name watc. YouTube channel settings allows you to set a redirect URL for a specific channel, so what this user has done is have the channel of watc redirect to the video uploaded by user 666. That's it really.