How to join videos together?

import all your videos into windows movie maker and drag them all onto the timeline and finally click on 'Publish movie'' or 'Save to My Computer'....when done youll find your movie n 'My Videos' file folder

If you have removed windows movie maker (like I have) then you could use the joiner from Boilsoft Video Splitter, Video Joiner, Video Converter software if you don't have any video editing software.

If you want free, full featured, video editing software you can get it at Lightworks Pro 11.1.1 - The professional non-linear editor for Windows

Personally I use Sony Vegas for that sort of thing.

I have used Movie Maker to create a number of great movies on a... PC....
but you do not need it for your purposes.

You need an app! And apps are cheap!

If you are using an iPhone, invest $5 and purchase the app: imovie.

If you will be shooting movies on your iphone, hands down: the simplest, easiest solution. You can do simple edits, cuts, even add music, and a lot more...

You can easily join your clips together. You can even directly up load your finished movie directly to YouTube, if you wish...

Easy easy.

You may want to spice up your movie a bit, so download the free app:
Intro Designer Lite: this app will give you incredible intro templates for your movie.

After you get familiar with this, upgrade to the paid version, very much worth it.

Play around with this and you will be amazed at how easy it is to create incredible movies for YouTube.

Finally I suggest you get CLIPish Pro 2. It's also cheap, I think less than $3. This will allow you to do outros, slides, and so so much more!

For a little more than $10 you just made your iPhone into a virtual movie studio.

Invest a bit of money and a bit of time to figure stuff out, and you will astound yourself with the movies you can create by just using an iPhone...

Or, you could upload them all and simply go into the video editor and connect them that way. Very easy to do and free (if you don't have any editing software).

Youtube has a built in video editor that lets you combine and trim videos; add music and rotate clips, etc. This might be the easiest solution.

YouTube

Sooo many choices, but MS Windows Live Movie Maker would be probably be the easiest and definitely the cheapest.