If you're good at Photoshop, you might want to try learning a Program like Fusion to Retouch video.

I just published a half hour course on everything you need to know to get started retouch video.
You can download a Commercial licence of Fusion for Free from Black Magic and Get learning how to use Vector Paint/Clone Animation to Retouch video.

Find My Fusion Course on Demand here.
https://vimeo.com/ondemand/90733

I have been using Digital Fusion many years ago when I worked in the cinema industry. It impressed me with how good and stable this software was made. It was still version 3, then 4 at that time. The last time I used it was for a short film in 2013. I can't recall the version number but it was still that good.