Now should I be focusing on OTHER people's video's that are getting like 30k views a week?? and use their description & tags???
Would you think that'd be the best idea?
No, IMO that's a bad idea, I always advise against copying in any venture like that, because they did it first, they have the views, they have the ratings, the 'links' and the comments, etc., so you're making a poor copy, which gaurentees you'll always be below them in the rankings (and because lots of people copy, you're likely to be
well below them in the rankings).
IMO any stratergy that almost certainly leads to guaranteeing that you
won't be #1 isn't a great stratergy.
For my $0.02 I'd advise picking relevant tags, relevant to your videos, and to your target audience.
Try and get into the head of the average user, who you want to profit off, and think what words are they going to be using, to search YouTube?
Make your videos at least partially relevant to those words, and use them as your tags, and you should do ok.