It’s one of those great movie industry ideas: simple, but effective. And not just for lock-down shots: with a bit of practice you can actually achieve decent pan and tilt movements.
The bag will fit into those tight spaces we referenced earlier, but includes a mounting kit that allows you to fix the bag to just about anything: a conventional tripod mount, Dana dolly–pretty much anything that you can wrap a strap around.
For the ultimate in portability, the “Marsupial” variety of CineSaddle bags include an additional pouch for storing your smaller form-factor cameras–DSLRs, Ursa and ALEXA Minis etc. (Full-sized Ursas, REDs and ALEXAs need not apply). In other words, your camera bag is your tripod.