Hello guys, turns out you can download call recordings from the browser using the Network tab in Chrome DevTools. See this video for a demonstration: https://cdn2.hubspot.net/hubfs/3967897/2d188e44d1a54df3b9247d610ec00377.mp4
(as an aside, another option is to use the HubSpot Engagements API (e.g. this endpoint) -- each call with a recording will have a “recordingUrl” attribute with a link to the mp3 file. This might be the correct approach if you are looking to download recordings in bulk, for example)