What May Cause Tumblr Videos Not Playing? It's a common occurrence to get a "Video Not Found" error when we are trying to listen to a catchy music video on Tumblr. Tumblr is a simple and fun way to share pictures and text. There is a feature for users to post music videos on their blog, so many users upload music videos to Tumblr. You can also visit the grambe for more information. When it comes to your Tumblr videos, you want them to play perfectly. If there are problems with your video or you're having troubles watching it, this can be frustrating! Luckily, there are a few things you can try to fix this issue. First, make sure you have third-party cookies and JavaScript enabled. If you're using a different browser, try using Chrome. It's also important to remember that you need to view the page in a recent browser. We suggest using Firefox or Chrome. If you're still having troubles viewing your Tumblr video, there are a few things you can try. Clearing the cache, running a virus scan, or updating your drivers can all help if your problem is with your computer. You can also take your computer to a tech to have these checked out.