How to link to youtube from a .url file so that it plays on Firefox without Flash?

With my software installer I include a tutorial.url file that points to a youtube tutorial. It has worked fine for years. But now there is a problem with Firefox 37.01 as default browser if no Flash player is installed, so youtube uses the Html5 player instead.

The content of the tutorial.url file:

[InternetShortcut]
URL=http://ift.tt/1hEa25O
IconFile=C:\WINDOWS\system32\SHELL32.dll
IconIndex=130

Double clicking on the tutorial.url works fine if Flash Player is installed, but if not a file save dialog is displayed. Screenshot: http://ift.tt/1EX4NYM

The strange thing is that if instead of launching the tutorial.url file I paste the video URL (http://ift.tt/1hEa25O) directly to Firefox it plays just fine with the html5 player.

Is there any workaround? Can a .url file with a link to Youtube be created that works on Firefox without the flash player?