The Bicycle Touring Pro (it’s on YT) has some of the best touring videos I’ve seen. He uses a Cannon something, a GoPro, an Android phone (sometimes), a drone of some sort, a tripod and assorted mounts for the GoPro on the bike. He does not use a chest or helmet mount. He has done literally hundreds of videos of the tours he’s done for the past 5 or more years or so. It’s a business at this point, takes a huge amount of time to document the riding, as well as the editing after. His website details the gear he uses.
https://bicycletouringpro.com