After you've added a video to Google drive, you can embed it directly into a Step. First, make sure that the video has sharing permissions setup according to your preferences.
Next, use the share link to open the video in a new tab. Click on the ellipsis in the upper right.
Select the option to Embed Item.
Copy and paste the text that appears when you select this.
Next, go into Code View within Trainual and paste the embed code.
After pasted, click out of Code View and your video will appear!