- vidos = will see (will be seeing)
- vidis = saw (has seen, had seen, was seeing, had been seeing)
- vidas = see, sees (is seeing, are seeing, am seeing)
- vidi = see (infinitive - sometimes translatable as "to see")
vida would be something like "visual" or "optical" -- an adjective referring to sight or vision.
There is also vidus "would see (would have seen)" and vidu! "see!".