Automatically loading a URL without a user-initiated action is generally a discouraged UX practice. In many cases, browsers will prohibit this.
Annotations don't have the capability to load a URL without a user action. However, if you're technically inclined, this can be done using our APIs. You would create a JavaScript listener for the video-complete event, then perform the desired action. If you decide to take that approach, Brightcove can provide some code examples to help.
Here's a working example:
https://jsbin.com/wilaq/1/editAt the end of the video, it auto navigates to hapyak.com. Here are the important lines of code:
onTrackingEvent: function(data) {
if (data.event==="Player Action" &&
data.properties.Action.indexOf("End")===0) {
window.location.href = "https://corp.hapyak.com"}}