How to Add YouTube Channel Trailer

1. Browse settings should be enabled in Channel Navigation

2. You will see For Returning Subscribers and For New Visitors. Choose For New Visitors.

When creating your channel trailer, remember that it should be: 
Be for the people, who never heard of you and your channel
Be short and to the point
Grab your viewers’ attention from the first few seconds
Show, don’t tell Ssk viewers to subscribe in your video and with annotations