BeneluxNetherlandsNOS (National public television)
Thursday June 4 2100 - 2400 CET: Dutch results
Sunday June 7 2230 - 2330 CET: European results
Live stream at
http://europakiest.nos.nl/liveBelgiumVRT (Flanders): June 7 1330 - 2300 CET (polling stations are only open in the morning, an advantage of compulsory voting). Results of the elections for the Flemish Parliament and the European Parliament (and also the Walloon, Brussels, and Germanophone parliaments)
RTBF (Wallonia): As VRT, but 1500 - 2400 CET.
I was not able to locate a live stream for both these broadcasters.
LuxembourgRTL
June 7, 1900 - 2400 CET: Results of Luxembourg Parliament and European Parliament elections
Live stream:
http://tele.rtl.lu/waatleeft/livestream/