Strong tickers Volvo 850 2,0 20V

Hello dear Volvolaner, I am relatively new here and hope for tips from you. With my Volvo 850 2,0 20V BJ. 1994 italoimport petroler it clacks lately quite nasty under the bonnet. When I bought the Volvo there was the noise only until the engine was warm, meanwhile it is also clearly listening to warm engine…. ÖL change was carried out about 2 months ago with 10W40. Now I am unsure, since I have read here different things about this topic… from this G I made a short video and hope you can shove me in the right direction Video link: VID_20160218_170918.mp4 orhttps://www.youtube.com/watch?v=wDWT4rU24uM thank you!! thank you, Basti