playing a commercial DVD [with both audio and video] over zoom

i am having the opposite problem from some others on here. i am using zoom with  

• a macbook air [MacOS version 11.7.9]

• an LG external DVD drive 

• a commercial DVD that includes both audio and video

• the VLC media player 

i CAN display the video from the DVD; i CAN successfully 'share screen' in the meeting, so that participants see the video; and the sound DOES play – for me only – on my local speakers. BUT i cannot get other participants to hear the audio when i play the DVD. 

any suggestions on what to do? the DVD is long, so i don't want to screen the whole thing with subtitles only.