See this link for TV stations in your country showing the Junior & Elite racing on Saturday 29th July. If there is no station showing it on TV in your area then please see tv.uci.ch. Please note if there is a TV station who has bought the rights in your country then  it will be geoblocked on tv.uci.ch

http://www.uci.ch/mm/Document/News/News/18/31/88/2017UCIBMXWorldChampionships-TVSchedule_Neutral.pdf