As professors, the Künstlerhaus Bethanien gathered other renowned International and European directors such as Andrei Tarkovsky, Patrice Chéreau and Robert Wilson.

[7][8] In 2001, a large audience took notice of Veiel's documentary Black Box BRD, in which he is bringing the biographies of Alfred Herrhausen, chairman of the Deutsche Bank and his suspected assassin and Red Army Fraction (RAF) member Wolfgang Grams face to face.

[17] According to his technique of longstanding and profound research when dealing with a subject, Veiel explores the topics of his films also as an author of non-fictional books.

Alfred Herrhausen, the Deutsche Bank, the RAF and Wolfgang Grams gathers and extends by far the results of the research shown in the film.

[28] In February 2017, Veiel's cinema documentary Beuys celebrated its premiere at the competition of the Berlin International Film Festival.

[32] Veiel does not try to explain Beuys by the means of a classical biography, but his use of the archival footage rather “allows the viewer to not only enter the time and space that the artwork was developed in, but experience its conception and creation alongside the artist himself.” [33] Veiel is particularly interested in Beuys' extended concept of art as a social sculpture, which anticipates today's demands for basic income and a democratization of the financial and monetary system.

It’s described to be the film of record and “the most extensive revisiting of Beuys’s art and life for a general public.” [35] “The documentary Beuys will not only offer a psychological portrait of the man, but chronicle the many ways he sought to reverse the effects of our repressive social systems — and how his breakthroughs continue to influence artists today.

"[39] In 2017, Veiel together with the author Jutta Doberstein and in cooperation with the Deutsches Theater Berlin and the Humboldt Forum initiated WHICH FUTURE?

!, a two-year interdisciplinary, participatory research and theatre project, dedicated to drafting a fictional, yet evidence-based scenario for the next ten years.

[40] The play was mainly well received and regarded as „an engrossing drama that skillfully avoids preaching or propagandizing” with special recognition for the script, which “does a fine job dramatizing the complex ideas developed during the workshops, explaining complex hypothetical economic and political scenarios in clever and nuanced ways.”[40] In his German TV movie Ökozid (Ecocide) from 2020, Veiel stages a court drama, as low-key as it is spectacular.

Two lawyers represent 31 countries of the global South, which are doomed to destruction without the support of the international community, they raise questions of responsibility, demand compensation and a right of nature to integrity in order to ensure their own survival.