Short answer: waaaaaay too much initially. It's a shame: people are usually excited to stake and 1000 is so far beyond the reach of the majority of ETH holders.

Other cryptos will let you stake what you have: Neo for example or Arc through delegated PoS. Psychologically, I feel beyond the feeling of getting "interest" it really ties you to the project an makes you less likely to sell.

Thanks for sharing the video! Any update since August on the timeline for sharding? 10 ETH is still beyond my personal reach, but that would certainly make ETH staking much more accessible! :)