which video ? must be a wrong link then.
These airbags are autonomous i.e. nothing to fasten; this is their main advantage together with the activation speed resulting in 5 stars SRA certification (5 stars mean that their activation time happens just on time to be protected for most situations unlike the others).
From now on, those with a tether will belong to the past since none got more than 3 SRA stars out of 5 unlike the 3 models in question and because, finally, the price of these electronic and autonomous airbag jackets are pretty close to the tether ones