I don’t like camera straps, don’t wear them at all, and recently reviewed the Spider Holster for our sister site, Sony Mirrorless Pro. The good news is many other photographers don’t wear straps either, so there are options from other brands, like Cotton Carrier.
The CCS StrapShot is designed to wrap around your existing backpack strap or loop onto your 2-inch belt, as the video shows. With a patented twist and lock system it gives the user an ideal place to carry their camera.
I haven’t tested this carrier, but it looks simple enough. The Strapshot sells for $79.00 on Amazon.