I have experience doing closed captions for Youtube videos such as web series, commentary videos, and informational content. The videos I have worked with have ranged in length from one minute to one hour. 

Services include: Accurately timed closed captions on your video, in English. A full transcript can also be provided on request

Since YouTube no longer enables community captioning, I use the subtitling platform Amara. You would upload your videos to the site, where I would caption from there.