You can not. To avoid losing views and engagement, you can only edit the video within youtube which involves deleting sections, or trim the beginning or the end, blur effects, change music
Youtube Video Intros
Boosting Channel Recognition using new intro videos
NOTE: Nothing on this page tells that this is discontinued. But the next article says: It was discontinued in 2015, with Google forcing creators to either remove the intros or have them merged with their videos forever.
YouTube cards are the interactive cards you see in YouTube videos (usually at the end) that let creators share clickable links to relevant content throughout a video. You can add up to five cards to each video and you can use cards in any video including TrueView Ad Campaign videos.
How to edit a YouTube video after your have published and released it publicly! The YouTube Studio editor allows your to trim the start or end, or even remove entire sections of your videos.
If you have released a video and want to trim, cut, change or edit it, this is an easy was to do it without losing any of your views, stats or data.
Shows how to:
Find the editor window
Using the trim button to remove sections of the video
Remember that trimming parts out will change all the timestamps
Key to editing is zoom - 5 levels of zoom
Trimming off the end of the video
Use preview button, then save - and it will save all the edits - may take 2 - 3 hours to post the edits
Trimming in the middle of a video
Using the split button
the greyed out area will be removed
Garnet's hint: You may want to get in the habit of leaving natural gaps in your videos, instead of speaking too fast