You need to understand copyright if you are planning to upload content of any kind to a website.
Visit : copyright.ubc.ca for more information or drop in to ask specific questions. They regularly offer workshops and drop in sessions to help keep you informed.
As a rule of thumb: Use creative commons or public domain images. When you search for images online use ‘creative commons image search’ and specify your needs. If you do not need the content for ‘commercial purposes’ be sure to deselect this option as your choice of images will ‘open up’ considerably. From the CC image search browser, you can search using several popular sources such as google images, flickr, wikimedia commons and youtube.
Please note that this search will then ‘filter’ the content and attempt to show only those with a CC license – it is still up to you to ensure the content does not contain other licensing restrictions. Licensing restrictions and requirements are generally clearly stated on the image source page. If this page states this is under CC license for attribution, then you simply need to attribute the work to its author. There are often guidelines on how to do this within the page. In general, I always ‘attribute’ whether this is required or not.