It's not just the shorts. I've been seeing a flood of YT videos purporting to be by relatively well known people like George Conway and Rachel Maddow and every one of them is an AI generated video using their likeness and voice. Amazingly, YT has no mechanism for reporting this.
Fortunately, in most cases there are a few "tells":
1. The facial expressions (blinking, eyebrow movement) don't match the content and tend to be weirdly either too repetitive or not repetitive enough.
2. You'll see hand gestures repeated exactly over and over that are out of sync to the content
3. The voice will sound weirdly emotionless. Not robotic, but a little too flat, especially given the subject matter.
4. They tend to always wear exactly the same clothing even across many days or weeks of posts. You can check this by going to their channel and looking back over the last few posts.