In the comments of the video user @killterm wrote a helpful list of the game titles with timestamps, mentioning whether they are World Premiere trailers. All in all there are 55 world premiere trailers shown in the showcase.

::: spoiler @killterm's comment for reference (click on this line to expand) 5:58 Echograph
6:56 Gun Knife Bomb [World Premiere]
7:42 DONUT PANIC
8:40 My Little Cafe Nightmare
9:34 Dead Watch
10:58 Nowhere
12:12 Parasensor [World Premiere]
13:00 Lurking
14:02 Inherited Shadows [World Premiere]
15:40 Eternal Haunt [World Premiere]
17:22 Last Chance Market
19:02 Livber: Smoke and Mirrors
20:10 End of Ember
21:08 TIC-TAC: Twelve o'clock [World Premiere]
22:12 Dark Lessons
23:16 Night Plane [World Premiere]
24:42 The Bagman
26:40 Springs, Eternal [World Premiere]
27:08 Forest Escape: Last Train [World Premiere]
28:24 Out Fishing
29:18 Liminal Point
31:20 Caravana 2000 [World Premiere]
32:18 Pulsebreaker [World Premiere]
32:48 The Miracle Of San Martin
34:34 DIVE or DIE - Children of Rain
36:18 Baptiste
37:14 Dreadline Express
38:34 Your Debt Is Paid
39:30 THE FATUM [World Premiere]
40:36 Beyond the Dark: Nightwatch
41:40 Ultrasound
43:02 Iris Dissolution
44:34 Remnants of R'lyeh
46:00 The Patient - can you escape?
47:28 Vampire Huntress - Lament of the Sun [World Premiere]
48:48 Alice In Pumpkinland [World Premiere]
50:30 Hey, Don't Look at Me
51:28 SHOCK [World Premiere]
52:44 Mimic
53:52 ESCAPE Protocol: Online
55:20 Silvanis
57:12 The Road of Dust and Sorrow
58:32 Who Are You!? [World Premiere]
59:34 Oniria [World Premiere]
1:00:32 Signal Veil [World Premiere]
1:01:22 Zangyou: Overtime
1:02:52 Curse of the Crimson Stag
1:04:14 Sisters of Solitude
1:05:44 Tormented Souls 2
1:06:48 Paluah's Trench [World Premiere]
1:07:50 Human.exe [World Premiere]
1:09:20 Void Martyrs
1:10:18 Barotrauma - Home & Harbor Expansion
1:11:26 Solace Creek [World Premiere]
1:12:52 Hazard Levels [World Premiere]
1:13:48 Where Dolls Hang
1:14:40 Ashfield Hollow [World Premiere]
1:15:24 Alchemortis
1:16:30 A Game About Breaking A Cube [World Premiere]
1:17:42 Dark Fracture [World Premiere]
1:18:18 Bird Roll 64 [World Premiere]
1:19:02 I SHALL NAME THE DEAD
1:20:10 LURKS WITHIN WALLS
1:21:12 The Funskin Project
1:22:52 End of Abyss [World Premiere]
1:30:24 Hollow Ones [World Premiere]
1:31:10 Mourning Tide [World Premiere]
1:32:10 Delusion Out of Space [World Premiere]
1:34:12 Don't Pick Up
1:35:10 Confronted [World Premiere]
1:36:40 The Pines
1:38:06 De/Ascend [World Premiere]
1:40:22 Shadow Sacrament: The Roots of Evil [World Premiere]
1:42:08 Slain 2: The Beast Within
1:43:42 Deck of Haunts
1:45:12 Huntsman [World Premiere]
1:46:22 Night of the Idle Horde [World Premiere]
1:47:06 Below The Blades [World Premiere]
1:48:06 The Occultist
1:49:54 SPARROW [World Premiere]
1:51:08 Cosmic Fear
1:52:14 Umbra Halloween [World Premiere]
1:53:42 Athanasia
1:54:58 Nightmare House
1:55:26 Paraxima
1:56:40 Dark Pals: The 1st Floor [World Premiere]
1:57:12 In Hope Voiden
1:58:02 Follow Us
1:59:08 Dead of Darkness 2
2:01:42 Encryptid [World Premiere]
2:02:40 Shutter Story [World Premiere]
2:03:58 Cleaner Company
2:05:10 Bladesong
2:07:02 Fangstorm
2:08:12 CONFINED: Leaving OKB-134 [World Premiere]
2:09:06 Those Who Dwell
2:09:50 INFERIUS
2:11:10 Silk & Sorrow [World Premiere]
2:12:02 REANIMAL [World Premiere]
2:12:32 Descendant of Night [World Premiere]
2:14:22 PSYCHO DEAD [World Premiere]
2:15:40 Otherside Tapes: Favela
2:20:56 Tenebris Somnia
2:22:08 Farsight [World Premiere]
2:22:48 Murder Meet Cute
2:24:22 Paper Bleed [World Premiere]
2:25:46 Lucid Falls [World Premiere]
2:26:50 Kopernicus: Incremental Suffering [World Premiere]
2:28:36 Wilderdark
2:29:50 BrokenLore: MIKI-CHAN
2:31:34 BrokenLore: ASCEND [World Premiere]
2:32:48 The Hambagu Shop [World Premiere]
2:33:38 The Boba Teashop – Refill
2:35:06 BrokenLore: DON'T PLAY [World Premiere]
2:36:32 BECROWNED [World Premiere]
2:38:46 Mayfly [World Premiere]
2:40:34 Clive Barker's Hellraiser: Revival
2:44:42 Mr Magpie's Harmless Card Game
2:45:58 SOMBRAS: negative frames
2:47:22 Remothered: Red Nun's Legacy [World Premiere]
2:49:16 Silver Pines :::

There is also a Steam page for the showcase.