I was doing the video rewards and It say I could win 1-1,000 jem's and I got 2 considering you have to watch close to 10min of ads +15 ads) to get to the big reward the odds should be higher or the you should just lower the max reward so it doesn't seem like a terrible deal

You are still getting free stuff all along the way to the "big prize" on the last video. I actually love today's prizes with the habitat tokens.
The 1000 gem prize is given out at certain odds, I don't see them listed but it's probably 0.1% chance or something small like that. And the smaller prizes have closer 40 or 60% chance each. I hope I'm explaining this right. But this is how it should be; it should be neither easy nor common to get huge rewards for free.