At Vidalytics, we offer two different types of embed scripts: async and sync.
You need to figure out which one you'd like to use BEFORE you install it on your website. It is a different script, and in order to change it, you'd have to mess with the code again.
This is basically how it works:
Sync blocks other 3rd party assets that come after it, but the video will start faster.
While async doesn't block other assets. So the page should load faster, but the video a little slower.
FYI - Nearly every script out there is going to be async. So that is the default.
If you don't want to go brain dead on this - you can just do async :D
If you have any questions about which script to use in your specific case, don't hesitate to reach out! We're here 24/7!