Here are the video and banner sizes that work best with YouTube.
This comes from HooteSuite blog.
YouTube Length Limits
Maximum file size: 6GB
Maximum length: 15 minutes
If you verify your YouTube account, you may post videos up to 12 hours in length and 120GB in file size.
Oakland’s Audio Visual Consultants provides YouTube consulting. You can see more of our YouTube training blogs at:
AVC Video Services: San Francisco YouTube video production. Virtual events. Video consulting.