first we will have more viewer
Thats something you hope to achieve but nothing you know for sure. An english speaking caster will maybe able to fulfill your expectations. At least he or she has a chance to do so.
and second u can life cast it with no lucky and upload it then on youtube
In theory you are right.
If you take a closer look this is not an option since i can only stream in 720p with a very bad frame and bit rate. This doesn't meet my YouTube quality standard. Furthermore my experience shows that Twitch uploads will receive way less attention on my channel then regular cast.
To sum it all up, I tried the whole streaming thing several times and it´s noting that works for me.
I hope you find someone who will be able to help if with this challenge.