You can enable collaboration on a YouTube channel through the permissions settings in YouTube Studio. In the permissions you'll find options for inviting channel editors and managers. Simply enter the email address of the person you want to invite and he/she will get a notification with a link to join the channel with their assigned role.
It's important to note that if you are doing this in a G Suite for Education domain, the people that you invite as co-managers or editors on your YouTube channel should have email addresses within the same domain.
On a related note, when you are posting long videos like recordings of awards ceremonies it can be helpful to include timestamps in your video. Here's how to do that.
