And I think it would be "good form" to let you see/hear the said evidence before you face any enquiry. I can't see how you can reasonably be expected to answer any accusations if you do not know what those accusations are.
It would probably be unfair not to.
just following on to this point. surely the recording of the OP is his personal data, to which he would be entitled the right of access under GDPR regardless of any company policy.
