On our online editing tool, you can only change the speed/duration of the whole video. You do that in step 3, "Video Production".
But we do have a custom video service where a member of our team will work with your video, for example if you want to cut the video, or you want to change the template, add slides, or add voice to the video.
The cost for having us do manual work on your video starts from $50 USD. Please contact us for a quote.