Introduction
A Facebook user Nangyal Khan shared a video on 4th April, 2022 of PM Imran Khan taking live calls from public and displayed that a caller Yaqoob Qureshi is defaming Prime Minister Imran Khan on live call.

(Screenshot from the post)

(Screenshot from the post)
The time when the information was retrieved, the video was shared over 340 times within 3 hours.
Debunked Source
https://www.facebook.com/100024076398486/videos/465814545294663/
https://www.facebook.com/nangyal.k.nangyal
Fact Check
Using AI Assisted Tool we extracted the key frames of the posted video

Using reverse image technique, we found original video of Channel 42 on YouTube.

(Screenshot from the YouTube video)
Caller Yaqoob Qureshi joined the call at starting point 02:20 and praised Imran Khan defaming Pakistan Muslim League Nawaz (PML- N ) core leaders his call was dropped by Management when he used an abusive word on a live telecast.
Source
Rating
Disinformation/Propaganda

Conclusion
Caller Yaqoob Qureshi joined the live call session at starting point 02:20, he praised Imran Khan and defamed Pakistan Muslim League Nawaz (PML – N) core leader, his call was dropped by Management when he used an abusive word on a live telecast, the original video was edited and posted by independent social media user to portray that a live caller scolded then Prime Minister Imran Khan on national television, the video was edited and shared with intention to malign the image of former Prime Minister of Pakistan Imran Khan.