Some browsers, such as Mozilla Firefox or Safari, do not support pop-out video. In this case, you may see an error similar to the one shown below.
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If you see this warning, we suggest you switch to the following browsers:

Currently, we don't support pop-out on mobile devices, some tablets, and the installed Chrome Pencil Spaces app.

Not sure what pop-out video is or how you can use it? You can find out more in our help article here