Often you cannot here the audio because the Webex recording has defaulted to a background speaker that isn’t active. Please follow the instructions in the following link to transfer recording audio to your primary speaker. help.webex.com/en-US/article/WBX48625/No-Sound-when-Playing-Back-a-Network-Based-Recording-(NBR)
If you are still experiencing difficulty, please contact Customer Care at customercare@td.org or by phone at 1.800.628.2783 for additional assistance.