The Video I've added to a block is not working?
The CTA Block, Content Block and Hero Block allow you to input a video link to embedded a video from Vimeo or YouTube.
It is unclear and not stated, but the format for these must match the below. You need to replace the letters/numbers with you video content.
These are the formats that are found in the automatically generated embedded links from YouTube and Vimeo. However you can just edit the normal link to match these formats.