<!--- Please read this! Before opening a new issue, make sure to search for keywords in the issues filtered by the "regression" or "bug" label: - https://gitlab.com/gitlab-org/gitlab/issues?label_name%5B%5D=regression - https://gitlab.com/gitlab-org/gitlab/issues?label_name%5B%5D=bug and verify the issue you're about to submit isn't a duplicate. ---> ### Summary When loading a PDF which features animated content, such as Flash, H.264 video, or GIFs, the animated content is not animated. <!-- Summarize the bug encountered concisely. --> ### Steps to reproduce 1. Upload a PDF featuring animated content. 2. Attempt to play the animated content. <!-- Describe how one can reproduce the issue - this is very important. Please use an ordered list. --> ### Example Project https://gitlab.com/slondr/pdf-example <!-- If possible, please create an example project here on GitLab.com that exhibits the problematic behavior, and link to it here in the bug report. If you are using an older version of GitLab, this will also determine whether the bug is fixed in a more recent version. --> ### What is the current *bug* behavior? <!-- Describe what actually happens. --> A "play" button appears overlayed on the animated content, but the content does not play when the button is clicked. ### What is the expected *correct* behavior? <!-- Describe what you should see instead. --> No play button should appear; instead, the animated content should play as it does in Okular, Adobe Acrobat, etc. ### Output of checks <!-- If you are reporting a bug on GitLab.com, write: This bug happens on GitLab.com --> This bug happens on GitLab.com