Knowledgehook has recently enabled teachers to insert videos into their custom Activity questions! Doing this is very simple, just follow these instructions:
1) Find the video you want to feature in your Activity on either YouTube or Vimeo:
a) If it's in YouTube, click the Share button (under the video) and then choose Embed and copy the highlighted code.
b) If it's in Vimeo, click on the paper airplane icon in the top right.
Then highlight and copy the code.
2) In the toolbar above the edit field of your custom question, click on the embed button
3) Your video is now playable from within a GameShow or during a Mission. TIP: This also works in the answer fields!