That presentation is like all the research that has been published in this domain, i.e. it presents some ideas that might be used to build an alternative theory of space-time, but no such actual theories.

There are already several decades of such discussions, but no usable results.

Time and space are primitive quantities in any current theory of physics, i.e. quantities that are assumed to exist and have certain properties, and which are used to define derived quantities.

Any alternative theory must start by enumerating exactly which are its primitive quantities and which are their properties. Anything else is just gibberish, not better than Star Trek talk.

However, the units of measurement for time and length are not fundamental units a.k.a. base units, because it is impossible to make any physical system characterized by values of time or length that are stable enough and reproducible enough.

Because of that, the units of time and length are derived from fundamental units that are units of some derived quantities, currently from the units of work and velocity (i.e. the unit of work is the work required to transition a certain atom, currently cesium 133, from a certain state to a certain other state, i.e. which is equal to the difference between the energies of the 2 states, while the unit of velocity is the velocity of light in vacuum).