Breach of privacy

My brother is currently involved in a divorce court case with his ex-wife (the opposition). However, our neighbour, who lives in the adjacent house and has no connection to the case, has sided with the opposition. Recently, this neighbour recorded videos inside our house without our knowledge, attempting to gather "evidence" against my brother. He circulated the video to the opposition without our consent and has even threatened to share it with "others."

They recorded through the ventilation. They live in the adjacent house on the first floor. We live in our house on the ground floor. They basically peeped through.

We have the video that he recorded.

What charges can we file against him? Please help!

Any helpline number will also be appreciated.

Edited for clarity.