How often the client looks up media from the host library

If i’m updating a file in the host library every 10 seconds or so how do I get the client to collect that file and automatically overwrite it with the same name? Is that a setting I can change somewhere?

You should never be directly modifying files in the CMS library. All access to the CMS library must go through the CMS or the API.

The Players then have a collection interval setting which is how often they connect to the CMS to collect new information. You can set that value as low as 30 seconds (60 seconds on some Players).