If you go to “trending” or “recently added” it will say “scope : federated” near the top of the page. If you go to “local videos” it will only show local videos sorted by default by upload date. If you go to any of these pages and click “more filters” you can choose under “scope” whether it shows federated videos, whether to sort by popularity or upload date etc, which languages or categories to display, etc.
Still, it is difficult to find good content on PeerTube in my experience. Your best hope is probably using sepiasearch.org rather than the search feature of your own instance.
Maybe not concrete goals with set time frames, but what I’d like to do is…