(1) The Trust uses Zoom to host a meeting. Therefore the video, including audio, is proprietary to Zoom and paid customers.
(2) The pertinent audio formats are MP3 and WAV. For a given audio, the WAV is finer resolution and about ten times the size of MP3.
(3) Transcribers I've found are applied to an MP3 or WAV file.
(1a) If you have a paid Zoom account, an MP4 or WAV file recorded during the meeting may be available via the account.
(1b) If you can't retrieve a file directly through a Zoom account, install the Audacity audio editor. It's multiplatform; Linux, Mac, MS Windows. In case of difficulty installing on a laptop, take it to PC Galore at 2744 W 4th Ave., Vancouver. For difficulty with a desktop system, find a local consultant.
Test to be sure the input to Audacity can be configured correctly; start Audacity and configure to catch the audio from the speakers or headset where audio is heard. Then start Audacity before the Zoom meeting begins and check the setup. After the meeting, have Audacity export to MP3 or WAV.
The audio can be saved in the native Audacity format, rather than exported, but the native format can not be transcribed.
(2) Submit the audio file to a transcriber.
Any of these Web based transcribers are likely to work except that some accept only WAV.
https://anytranscribe.com/niche-tools/wav-to-text-converter/
https://converter.app/wav-to-text/
https://audiototext.com/
https://turboscribe.ai/u/tools/convert-audio-to-text
https://www.veed.io/tools/audio-to-text/wav-to-text
(Which of those are owned by Google & etc.?)
In about a minute, anytranscribe.com made a good transcription of a 50 minute CBC program. Speaker identification errors were easily corrected with an editor.
That's all. Easy peasy!