To record an async video using Tella, first, you need to open the application and select the 'Record' option. This will open the camera and microphone of your device. You can then start recording your video by pressing the 'Start Recording' button. You can pause or stop the recording at any time. Once you are satisfied with your recording, press the 'Stop Recording' button.

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 the video, add text or stickers, adjust the brightness and contrast, and much more. You can also add a voiceover or background music to your video. Once you are done editing, you can preview your video to ensure that it is exactly how you want it to be.

The final step is to share your video. Tella allows you to share your video in a variety of ways. You can send it via email, post it on social media, or upload it to a cloud storage service. You can also generate a link to your video and share it with others. With Tella, recording, editing, and sharing an async video is a simple and straightforward process.