FORGET Discovery HD
The channel costs $3.99 per month (on Videotron).
Like most (or all) channels that broadcast in "HD", not all the programming is in true HD. However, the main problem is that Discovery HD (Canada) has nothing to show. They have been re-running the same handful of shows since they signed on. They run commercials as well. The most recent (HD) offering was a lame series on a voyage to Mars produced by Galafilm of Montreal. Absolute garbage.
Save your money.