As I understand the question, you would like to know if interference fringes or other indications of interference can occur **in air* due to the intersection of two light beams. The answer is "yes".
In the link you provided, two beams intersect to provide a high-intensity region where the light power density is high enough to ionize air. This is not interference in the sense meant by optical physicists. However, under certain conditions a very similar experiment will produce interference. Specifically:
- the beams must be mutually coherent
- the beams must be pulsed, in pulses that are brief enough that no significant changes occur due to heating of the air.
- the ionization threshold must be rather sharp (a small change in power density must produce a large change in ionization)
- the ionization lifetime - that is, the delay between absorption of light and emission of light - must be short compared to the distance air molecules (heated by the light beams) travel during the pulse duration.
If all those conditions are met, then the power of the two beams can be tuned so that ionization occurs where the beam amplitudes add (where the phases are the same), but not where the beam amplitudes subtract (where the phases are 180 degrees different). In that case, photoemission will occur only in the regions where ionization occurs, which will be in the planes of constructive interference.
Moreover, if the beams' powers are adjusted so that simply doubling the power of the incident beam cannot cause ionization and photoemission, but quadrupling the power will cause ionization and photoemission, then the presence of bright photoemission will be strong evidence that ionization is due to coherent interference of the two beams. That is because the power density at any point is proportional to the square of the summed amplitudes of the beams at that point.
Note that ionization is not necessary: any nonlinearly intensity-dependent photo-absorption process will produce "mid-air" interference fringes which can in turn produce visible effects.