[Bug] Next page button missing for search results

[Loosefish]

Describe the bug
When searching for some terms there is no "next page" button even though there are multiple pages of results. Looking at the code, this is probably caused by these searches returning < 20 results for whatever reason.

Steps to Reproduce

1. Search for "linux"
2. No next page button
3. Manually append &page=2 to url shows a second page of search results

Logs
No errors in any logs.

Screenshots
Search results page showing 19 videos:

After changing the url to show page 2:

Additional context
Tested with Chromium/Firefox on multiple public instances.

[syeopite]

Related: #1708