The `credentialId` is set to the calendar's `credentialId` [here](https://github.com/calcom/cal.com/blob/main/packages/core/EventManager.ts#L141).

This does not cause errors in updateMeeting because the correct video credentials are obtained using getVideoCredentials.

However, the handleCancelBooking handler directly calls deleteMeeting in the videoClient and does not use getVideoCredentials to obtain the video integration credentials. Accordingly, no videoAdapter is found for deleteMeeting.

Originally posted by @aar2dee2 in #7651 (comment)

_CAL-1651