At certain events, when we know we'll have quite a few happy customers present, we've started collecting live video testimonials.
We do our best to confirm customers to stop by to record a head of time if we have the attendee list before the event, and we prep the team working the booth on collecting more from folks who organically stop by.
We use Vouch so the videos get uploaded into a platform automatically and it's really easy to edit them for different use cases later. If someone doesn't use Vouch and just records on their phone, they can upload the file into the platform easily afterwards.