If I follow a channel, for example, if I upload the video and upload it to YouTube, then will it be copyright?
You don't give perfect clearance about your opinion..if you follow a channel then it's not copyright..But if you Copy/Download someones channel video and you upload this video in your channel then You tube claim that as a copyright..And as a punishment for this You tube can take any action even they can block or delete your channel as their wish..