This can't be anything more than just a fake way to attract new subscribers for the channel. There is no way to include new text within live video streaming. This video is just a pre-made and people are posting their addresses madly but if you check for the winning address, you can't find it in chat area.
You cant be more wrong.. that YOU can't do it doesn't mean someone can't do it. Go to the video and every time you write "free bitcoins" on the chat you will see your name on the video. Also when payment is sent they show on the video too and post same transaction ID on the chat.
Im agree with the statement. I believe the video was not pre-made since the name was listed there everytime you will write a FREE BITCOINS and I tried and see it.
The only questioned here like I said above is how legit is this. I didn't take this seriously and just idle my account online there while Im cooking our dinner lol. I will not lose a money just by staying online that's why it doesn't have a risk.