Toronto-based iLoveTV Entertainment Inc. will put its two-screen interactivity technology to the test April 6 when Corus Entertainment Inc.’s Documentary Channel uses it to enhance a broadcast of a documentary. The system uses markers in a broadcast to push content at users on a web site, and Corus will be the first high-profile trial of the product. The deal may also be one of the first in Canada to raise controversial questions about how much artistic control authors should have over their works in the digital environment, and what the appetite will be for two-screen content.