RAW_OP_RETURN=$(bitcoin-cli getrawtransaction "$TXID" true "$BLOCKHASH" | jq -r '.vout[] | select(.scriptPubKey.asm | startswith("OP_RETURN")) | .scriptPubKey.asm') DATA_HEX=${RAW_OP_RETURN:10}

echo "$DATA_HEX" | xxd -r -p > op_return.mp4