The videos only ever offer me 150 food. If a leaderboard is coming, I actually try to save them for the leaderboard spinning wheel, because at least then I have a better chance if getting something other than a tiny bit of food.
Update: LOL - So I just checked my video icon on my board a few minutes ago, and now I'm finally getting better offers. I still mostly won small amounts of food (mostly 350, one 500) and some coins (useless - I'd rather get food), but, I did win a gem! I was actually hoping for some runes, though. I really need to expand.