Problem
When attempting to view Kaltura media on a page in Canvas, you instead see a black rectangle with the message "403 Forbidden (Rate Limit Exceeded)."
Cause
It's likely that you're seeing this on a page that has many embedded Kaltura videos on it (more than 10). Canvas limits the number of API requests that can be made at any given time by a user visiting a web page. While this "throttling" helps Canvas manage server load, it may adversely affect users visiting pages that have many Kaltura videos embedded on them, rendering some videos unviewable. So although Kaltura video players are showing the error, it's really a Canvas setting that's creating the issue.
In our testing, it appears this affects Chrome and Safari users more than Firefox users.
Solutions
If you're responsible for the page's content, you may want to consider embedding fewer videos on one page. That's not always possible, of course. For example, if your Canvas quiz asks students to respond with embedded videos, SpeedGrader shows every question and answer on one page, possibly leading to this error on multiple players. (The way SpeedGrader displays responses isn't configurable, unfortunately.)
Otherwise, to resolve the issue, you can try one of two solutions.
1. Reload the Video Frame
- On the page with the error messages, right-click one of the boxes showing the error and:
- Within Chrome, select Reload Frame.
- Within Firefox, select This Frame > Reload Frame.
- Within Safari, select Open Frame in New Tab. (Note that this will open the video in a new browser tab.)
- Repeat for any other videos you need to watch.
2. Try Firefox
If you haven't tried already, see if the page loads better in Firefox. You may experience fewer 403 errors, or none, depending on the number of embedded videos on the page.