Add our logo or website url to short videos

I have a small job fort someone exp in adding logo/url to short video clips that will show on iphone. If you can add our logo (or web address url) on the videos, so the logo text/strapline is readable in the best position, that would be great. Also optimise so that it will show correctly on all devices, especially mobile phone, desktop, laptop, tablets. The price i am offering for this work is £50. Videos contain adult themes.

If interested, please provide your email address so i can share video files and word doc job description on WeTransfer, as file size is too large for PPH.