I don't know the details because I haven't used one, but yes there are video editors for phones and tablets.
But will you be hired to do video editing on a tablet? REAL work like for a media company or movie studio? No. ipad skills are mostly irrelevant if your goal is to be employable. The advanced animations and workflows are not being done on tablets. Most people like being employable.
At least kids in the 90s learned how to use a desktop, which directly translated in some way to an office job.