The Internet is probably the best way to find a good wedding videographer. Using the search engine you can type in key search phrases that will bring videographers in the geographic area you're interested in. Once you are on a videographer's web site such as https://www.tulievephotography.com/cairns-wedding-videography you can often view sample videos.
Sometimes a video is long enough to watch, so you may want to skip through the video and check out the quality of the content. Remember that many of these videos are streaming from the actual version of video compression. So the actual video quality should be better.
The main idea is to watch for the style of the wedding video. Also on the website, you may be able to find out more about the videographer under "about us" page types. This is a good way to get to know a little about a wedding videographer before you contact them to schedule their service. The good thing about the web is that you can visit many wedding videographer sites in a very short time.
Another good way to find a good videographer for a wedding video is to visit some of the local wedding vendors. Most of the time the wedding vendors that offer services will have a package of other vendors who they recommend. They often do this as a service to their clients and may not even earn monetarily from these packets.