Here is a clip mount you can easily attach to your hat to livestream and vlog with your smartphone or GoPro camera. The Action Mount Hat Clip Mount is easy to use. Simply clip in your phone into the clamp, adjust the extension, and you are ready to go. The holder fits devices up to 4 inches wide.
The size is adjustable, so you can change the distance of your device from your phone. Costs you under $26 at this time.