I think vlog/found footage is a great, unique use of the online format. From a Seeka TV perspective, we don’t do vlogs/found footage (though we do have “narrative vlogs”). But that’s just because of what Seeka TV is trying to do.
The virtue of a vlog/found footage format is that it is inexpensive to produce. If you can make it entertaining, you have content and a distribution mechanism that unique suits that type of content. And, as a filmmaker, you can use it to showcase your skills.
But unless you become the next best thing, I don’t see it is being a career path in digital.