I am a beginner with Bitcoin and there are a lot of things that I havent known well about Bitcoin, where can I find documents or videos about Bitcoin to learn more? Thank you for your help.
There are many threads and topics here that are helpfull and will help you learn more about bitcoin. In fact, this forum is like a learning ground for me when i was still new to bitcoin. I just read topics that is related to bitcoin and later on i became familiar with it. It really help a lot, just read and do some research.