Video Loop Tutorial
To make looping videos with audio, I used the following FREE sources.
Select a looping video here: http://churchmediadesign.tv/category/freebies/freebies-backgrounds/
Select an audio loop here: http://www.flashkit.com/loops/Easy_Listening/Instrumental/
Use WavePad to duplicate/edit/adjust your loop. The video and audio should be the same length. So if your video is 40 seconds long and your loop is 10 seconds, you can copy/paste the loop 4 times to achieve the 40 seconds. You can then use the effects menu to fade in and out the audio and silence the last 2 seconds.
TIPS: Right click in Wavepad and use tools like "Insert Silence" and "Repeat Loop". Use Effects-> Fade In/Fade Out to fade in and out the volume. To lower the overall volume of the clip, Select all and use Effects-> Amplifiy. Then set volume to 50% or 60%.
We must silence the last 2 seconds of audio because the script it is set to end the video 2 seconds early. This is done to prevent the display of the "play" button at the end of the video that otherwise would be displayed by Youtube.