I need a After Effct Designers

I need urgent help with a project I'm doing for a family event. What I need is very simple, but since I'm a beginner in AE I'm not able to get quickly in the result. I bought 2 fully opened templates for After Effects. These templates are: 1) [login to view URL] Https://[login to view URL] Bascamete Video 1 allows me to add a video to any composition. In this case I did a SlideShow with video 2 and just import it into the correct composition of video 1 and everything is done. However, Video 1 has a duration time shorter than Video 2. About 1 to 2 minutes shorter. That is, I need the time of video 1 to be increased. The template author himself explains how to do this in this tutorial: [login to view URL] In this case it is increasing from 2 minutes to 9. In my case it is much less. In this sense I would like quotations taking into account work to be done in up to 2 hours since in the video tutorial above the author does this process in less than ta minutes. If there are good proposals I will send through we transfer and dorpdown both themes already ready. I REPEAT the only activity will be to increase the video time q as I explained.