Can the Lewis dot structure of SO2 be experimentally verified?

I have just watched 2 different videos on the Lewis dot structure of sulfur dioxide, $\ce{SO2}$. One says it is


$$\ce{O=S=O}$$


and the other says


$$\ce{^-O-S^+=O <-> O=S^+-O-}$$


The first paper acknowledges the second structure and says they are both right. Isn't there some way of experimentally determining the bond length, or the bond energies etc to tell which is the true structure?


