Fix Tenor gif implementation

When the user uses a Tenor gif in Discord, it is counted as an embed in the transcript. I think we should add a check to verify if it's a gif and improve its rendering:
<img width="439" alt="image" src="https://github.com/user-attachments/assets/f4b64ecb-8d50-49ea-a9dc-2773d8d26100" />
