Audio loops are very useful for video producers. Using music loops to underpin dialogue and using a variety of loops can be effective and economical from a licensing perspective.
I am an audio producer, but do have to dip my toe into basic video editing from time to time. I currently use Abobe Elements, but the process of using audio loops should work with most video editing software. They are also easy to work with.
Step 1: Acquire loops that are seamless.
This means that they will repeat without an audible jump or gap. Typically, you need to use lossless files such as WAV or AIFF for this. Lossy files such as MP3 introduce small spaces in the audio where data is stored. This can disrupt the loop playback.
Step 2: Introduce the loop into the video editor timeline
Very easy in Adobe. Simply drag it in.
Step 3: Copy and paste
This can be done as many times as needed and they should snap together.
When you hit play your music should play seamlessly.