The video conforms to a normal detect thoughts
You initially learn the surface thoughts of the creature—what is most on its mind in that moment. As an action, you can either shift your attention to another creature's thoughts or attempt to probe deeper into the same creature's mind. [...] Questions verbally directed at the target creature naturally shape the course of its thoughts, so this spell is particularly effective as part of an interrogation.
Throughout the majority of the interrogation, the caster shaped the party's thoughts by asking questions. At the same time, the caster used his action to shift his attention between the party members, probably lingering on whichever party member was most engaged in the conversation at any given time.
In doing so, the caster learned the surface thoughts relevant to his questions, until the party caught on and filled their surface thoughts with cats and food.
If you probe deeper, the target must make a Wisdom saving throw. If it fails, you gain insight into its reasoning (if any), its emotional state, and something that looms large in its mind (such as something it worries over, loves, or hates). If it succeeds, the spell ends. Either way, the target knows that you are probing into its mind, and unless you shift your attention to another creature's thoughts, the creature can use its action on its turn to make an Intelligence check contested by your Intelligence check; if it succeeds, the spell ends.
At this point, the caster probed deeper into the first party member, who failed his save, learning something that loomed on that party member's mind, and then he shifted his attention to avoid the intelligence contest. The caster successfully repeated all that with the second party member. Finally, he attempted the same with the third party member, but she passed her save so the spell ended and the caster did not learn what loomed on her mind.
In short, the way the caster directed the interrogation, as well as the 3 consecutive wisdom saving throws (rather than 3 simultaneous throws) is consistent with a normal detect thoughts.
If there is anything abnormal, then it is the lack of spell components and the duration in excess of one minute. The duration can be achieved by recasting detect thoughts as many times as necessary, but the lack of components requires a specific feature or trait.
In my opinion, the most likely candidate for that caster is the Mind Mage (GGR, p233), an NPC who is capable of casting detect thoughts trice without any components through its Innate Spellcasting (Psionics) trait.
To achieve the same result with published material available to players, the caster needs the Subtle Spell Metamagic to ignore the vocal and somatic components. The material component is a copper piece, which could have easily been in the caster's hand throughout the entire interrogation.
The only other player option that comes even close is the Githzerai Psionics racial trait which allows the casting of a single detect thoughts with no components. However, this can't explain the excess duration and the appearance of Githzerai does not match that caster's description.