First, it is good Netiquette to allow others to embed your videos. So, don’t restrict content sharing. Given, helps attract more views.
Embed Netiquette For Videos
Video networks allow other users to embed video from the domain. Users get a choice when we upload. Also, settings can change. Hence, enable others to embed video. Allows it to go almost anywhere on the Internet.
Allowing others to embed your video exposes it to a new audience. Many bloggers embed video. Their audience becomes your audience.
Allow others to embed videos because it increases exposure.