After hard work, I completed the video verification. Now, I can withdraw btc. I wonder what happen if I don't have documents they want ? I lost money ? I don't know I have to identity verify when I only want to withdraw btc, they don't write it anywhere. You imagine, someday suddenly you can't withdraw btc anymore, they tell you to video verify, you don't know if you have what they need and your account have much money.
Interesting. Now, I don't believe that centralised exchanges should be asking for your video ID, as it pretty much is the complete opposite of what bitcoin is made for - an anonymous decentralised economy. However can't put the blame all on them since its the government that wants to know your info.
I'd say just avoid certain exchanges that are known to do that especially in bitcoin grey countries like China if you are not comfortable with providing your video verification. I'm pretty sure coinbase lets you withdraw without ID even if you have violated their T and C's but I am definitely not sure about Huobi or BTCChina since I have not used their services personally.
It wouldn't really make sense to switch exchanges though, since you have already gone the extra mile to verify yourself on video
Good luck with your future exchanges!