Because you would expect the people in charge of the company to answer questions regarding the actions of the company.

If you were driving your truck and crashed into a traffic light, and it was caught on camera, you would be expected to answer questions about that. Even if you weren’t driving, as the registered owner you’re still going to be asked about it, or at the very least to identify who was driving.

Gabe isn’t just a tertiary witness, he has direct responsibility. Not that I think he’s done anything wrong here, I’m just saying it makes sense to have him answer questions live in court, rather than give a pre-recorded interview. Doing it live but remote invites other issues, such as poor connection quality, which would rather be avoided unless absolutely necessary.