This depends on the specific instance. Some have better connectivity to certain places than others. What's interesting about Peertube is you are not tied to a

This depends on the specific instance. Some have better connectivity to certain places than others. What's interesting about Peertube is you are not tied to a single (commercial) CDN to distribute content to your area. If your local community is poorly-served by existing instances, consider setting up a local instances with some likeminded people and setting up replication (part of Peertube admin UI) for other instances/channels you find interesting and would like to be available locally.