Here are some ideas for checking photos and videos you see online.
A handy tool for photos is https://www.tineye.com where you can do a quick reverse image search. For an example, during the last presidential election, I saw a photo on my Facebook feed of Hillary Clinton shaking hands with Bin Laden. It’s not real. It looked photoshopped and it took very little time to find out it’s from a photoshop contest from a website. It’s o.k. to have differing viewpoints. It’s not o.k. to swallow misinformation without at least a quick check.
Check for altered video (you also can’t believe every video you see).
Submit photos for forensic analysis.
Another easy way to fact check a video is if you see a short excerpt or clip from a video that enrages you, maybe check for a longer version before you share your outrage. This comes from both sides of the political spectrum (and from outside politics). Here’s an example involving Trump supposedly ignoring a disabled child.
Look, if you think you don’t have time to double check before you share a photo or meme, maybe you don’t have time to share at all.