I occasionally act in locally produced TV commercials. I would like to make a "Reel" which is a collection of segments of commercials I have appeared in.

The copies of videos I have are all over the place: most on YouTube, some on Vimeo and several on websites.

Is what I want to do actually pretty technically complicated, for instance copying the YouTube and Vimeo videos and dealing with different formats or is it really pretty straightforward with the right apps or software?

If anyone reading this is skilled at this and would want to take it on, I would be willing to pay for it. PM me if this is the case.

Probably about 20 to 25 segments, maybe 3-4 minutes running time. Most but not all of the segments would not need synced sound.

I'm located in Bangkok.

Some options (assuming Windows):

Free Microsoft Movie Maker

Adobe Premiere - complex but fully featured.

The one I use - Roxio Creator

//edit - another one I have for basic work - DVDSoft Free Video Editor

Assuming you will be going all the way with this in your life, go with Adobe Premiere (as suggested by Tywais). Has tons of features and professional. Once you get the hang of it, quite easy to use/learn.

If you're on Mac OS...Final Cut Pro.

Recommend Lightworks here. Multiplatform (does farmed rendering by the looks of it) and Free

If you just need to crop and append videos together, Avidemux is free, works on all operating systems, and will do the job losslessly if you can manage to get all the clips in the same aspect ratio and resolution:

http://fixounet.free.fr/avidemux/download.html