Having just started revisiting the main series for the second time, I learned that there are minisodes to the main series that were released before seasons 2, 3, and 4. The minisodes don't affect the plot of the main series in any way, except in one case that gave additional information to one small episode in the next season's series, which generally doesn't affect anything.
I enjoyed the first half of the minisodes the most, but I can't say that I enjoyed them all that much. There were a couple of funny moments, but nothing more.
On their own, the minisodes look like some clips that just exist, and that's it. That makes them questionable to watch in the absence of a new experience from them.
By not watching these minisodes, you don't lose or miss anything. Although the entire duration of the minisodes is about 36 minutes, but except for general familiarization and fan service it is not worth watching.