For a job application I can see how the essays, videos, etc. could be considered onerous, but from the looks of it this is more like a _scholarship_ application than a job application, and five months of paid training in a work environment is a pretty significant scholarship. In that light, it doesn't seem excessive at all: of course you have to write essays, of course you have to make a short presentation; these are run-of-the-mill requirements for many (not to mention much smaller) scholarship grants.