I'm glad that Chinito said something, you are the third person to confirm that the sound was too low before. It was a very easy change for me to turn up the volume on the clips.
GIFs are incredibly powerful as well. Thumbnails get people to come in and loads of GIFs will give them a reason to remember what they read.
Photoshop has a monthly subscription, but they are said to be working on a freemium version. Until then, check out many Photoshop alternatives.