I think using it as an adjective in this way sounds kind of clunky in English - it's just such a long descriptor! "A video based on Arabic poems" sounds way more natural. Hope this helps! :)

Harry has given a good answer. Additional information: 1) If you must use an adjective compound, it'd be ' an Arabic-poem(s)-based (/ ...-basED)-ON video'. ( As Harry have pointed out, it's way too bloated). a. Execptionally, in this special very case, either ...-basing or ...-based will do, because you may say ' This video is based on some Arabic poem(s)' or ' This video bases itself on some Arabic poem(s). As for poem or poems, it depends on whether you base the video on one or more poems. Poetry is not suitable in this case, because 'poetry' means poems in general, all poems by a certain autor, or of a time etc., or the art of writing them'. Often we create compound adjectives to make sentences concise and easy to understand, avoiding two or more subordinate clauses coming at the same gramatic place, squeezing each other, making the sentence over-long, complicated and confusing, for example. ( I myself incline to write long sentences. I sometimes find the occasions when I feel the sentence may be too long and make it not joyful to read, or find it is even bringing myself trouble in arranging the sentence construction.) So it is good not to make the adjective compound itself too long and too clumsy. And if not necessary, we may use two simple sentences or a complex sentence. b. 'way entirely' does not seem natural.