Around minute 1:30 the horses start jumping a sort of wall, except it's almost like a small table-top so they (mostly) jump up onto it and then down off it again, though a few go all the way over in one effort. This type of obstacle appears in several other videos.
Cross-posting this from the "foxhunting books" thread ...
You might want to check out Full Cry: A Hound Blog, which features a lot of information on training foxhounds and beagles for hunting pack work. The blog is fairly new (has been up since July) and so far has focused on the Iroquois Hunt and the Clear Creek Beagles in Kentucky, but there is also some stuff from England. There also is a post that discusses Budgett's Hunting By Scent, as well as links to a fair number of hunts and to hunting texts available for free online.
Regarding the OP's query on training, the most relevant posts to date regarding training appear to be the following, and several of them include video.