Question:
Does video surveillance hold the same authority as witnesses in the eyes of modern halacha? If so would you need two sets of footage similar to how two witnesses are required in beit din?
Answer:
Video surveillance is not a substitute for testimony by two kosher witnesses, so therefore even though there are video cameras under the chupah you still need two human witnesses! Never the less a video can be used to prove a point as supportive evidence when needed. Also where Jewish observation is needed e.g. supervising the production of “cholov Yisroel” to ensure that only kosher milk is being used, many Poskim permit video surveillance.
Sources:
Gemorah Nidah 49b, CH:M 33:1
