Why do my uploaded slideshows look blurry in Facebook?
If you upload a SmartSlides slideshow to Facebook and it appears blurry, check the video quality setting of the video by following these steps:
Note that if your video quality is set to Auto, Facebook will optimize video quality so that your videos play without delays. This means that if you have a poor network connection that cannot load your video in HD quality fast enough, Facebook will show you videos in lower quality so that they load quicker. If you are using the Auto quality setting and have a poor network connection, you may need to wait for the video to buffer before HD quality kicks in.
Helpful Tip: You can update the default video quality setting for your Facebook Account by going to Settings > Videos and updating the Video Default Quality option: