In addition to photos, you can also record videos on the Samsung device, simply by changing the recording mode.

Note: After changing the mode, the camera view is smaller, which is normal as videos are recorded in a lower resolution.

Android 10 (One UI 2.0)
Step 1:  Open the  Camera -App
Step 2:  Tap on  Video
Step 3:  Tap on  Record
  1. Open the Camera-App
  2. Tap on Video
  3. Tap on Record

Samsung Instructions