I am afraid I don't know much this composer. There is a short Wikipedia article: http://en.wikipedia.org/wiki/Marcel_Poot
It mentions the Piano Concerto.
There is also this short blurb from the Naxos site:
POOT, MARCEL BIOGRAPHY
The Belgian composer Marcel Poot, born in Vilvoorde, Brussels on 7 May 1901. From 1939, he held various positions at the Royal Conservatory in Brussels, heading that institution from 1949 until 1966. He was one of the most remarkable musical personalities of his generation of Belgian composers, and left behind an extensive selection of mainly instrumental works for orchestra and chamber ensembles. He died in 1988.
Marcel Poot’s lively and spirited style of composition reveals youthful mischievousness and an uninhibited lust for life, expressed in lively rhythms and often short melodic themes. Poot’s music is seldom backed by deep thoughts, but the refined musical taste of the composer protects him from superficiality by an innate sense of balance in the formal build-up of his works, which as a rule are classical in structure. Poot’s modernism was never dogmatic, but a spontaneous synthesis of old and new, averse to systems and experiments. This is why Poot is in many ways a neo-classicist, even though he never admitted to this or any other style of composition. His preference for classically from schemes is derived from his respect for the important traditions of West European art-music of the past, while the pulse of his own age beats in clearly chiseled and tersely formulated themes. Thematic work and motivistic analysis of these often starkly contrasting elements dictates to him a logical extension of the musical idea, brusquely expressed in biting rhythms and muscular ostinatos. Poot’s music is mostly abstract, without reference to extra-musical content of meaning, and it emerges, as it were, from the logic of strictly personal musical imagination.[/b]
I contacted the piano soloist in the YouTube performance, and he told me that there has only been one commercial recording of the Concerto before but that it is no longer in print. So the YouTube performance is it.