Ask HN: Would you use a video alert service?

I'm helping a friend promote a set of Feed tools and part of the set is a Video alert system: http://www.specificfeeds.com/youtube-feed

The user can request alerts based on keywords or specific authors/submitters.

First step: I'm trying to establish the target audience.

So, the questions are: would you be likely to use a service like this? And if yes, what would you primarily do with it? Would it be mainly for entertainment or can you see it being useful for business?

Thanks.