Their thing, if you look back on other recent videos, is that literally every physics channel on YT gets relativity embarrassingly wrong, each directly contradicting Einstein in one particular or other. It turns out people have interpretations incompatible with the maths, and say very foolish things they clearly have not thought through.
time as a dimension is hard to reconcile with entropy and quantum mechanics. And it allows for unintuitive ideas like the expansion of space-time over time (wat?)
Their thing, if you look back on other recent videos, is that literally every physics channel on YT gets relativity embarrassingly wrong, each directly contradicting Einstein in one particular or other. It turns out people have interpretations incompatible with the maths, and say very foolish things they clearly have not thought through.