Why Every Photographer Needs the Benro SuperSlim Travel Tripod

What's the sling bag in the vid?

Is this more compact than the cyanbird?

Price?

Center coloum metal or abs?

Hello! I recently purchased this tripod, but the joint between the piece that makes it extendable, where other appliqués can be placed by means of a thread, is not completely fixed, it moves slightly, making the camera unstable when I use the extension to get more height. Is this normal? What am I doing wrong? I have searched several pages on the Internet without success. Thank you very much 🙏🏼