To record a demo video using Tella, first, you need to open the application and select the 'Record' option. This will open up a screen where you can choose to record your screen, your webcam, or both. You can also choose to record your voice if you want to provide a voice-over for your demo. Once you have made your selections, click on the 'Start Recording' button. The application will then start recording your screen or webcam, depending on your choice.

After you have finished recording your demo, the next step is to edit your video. Tella provides a variety of editing tools that you can use to enhance your video. You can trim unwanted parts, add text or images, and even add effects or transitions to make your video more engaging. You can also adjust the audio levels if you have recorded a voice-over. Once you are satisfied with your edits, you can save your video.

The final step is to share your demo video. Tella allows you to share your video directly from the application. You can choose to share your video via email, social media, or even embed it on your website. You can also download your video and share it manually. By following these steps, you can easily create a professional-looking demo video using Tella.