How worried should I be about the abundance of this unidentified ant?

Recently bought a home and nicer weather has initiated yard work I was redoing a flowerbed in the backyard and when I lifted up the old wooden barriers there were swarms of ants underneath. Eggs and larvae (I think), tunnels every which way.

Investigating further, nests- or large quantities of ants with eggs/larvae- were also found under many rocks and under this old dingy tarp in the corner.

So far we haven't found many in the house; a few last month, but sealing gaps seemed to keep them out.

My questions are, how worried should I be about the overwhelming quantity of these ants? Is it cause for concern? Or is it just "yea... ants live under things".

They're so small that I can't even really see their detail none the less get a good picture of them. About 3mm, very tiny, black.

Pics in hand and next to ruler

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Visual of where DE was laid down, indicating where I found nests.

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Video of nest

https://vimeo.com/429800358

 

Some Ortho Home Defense is a good DIY product to start with!

 

I couldn't open the pics but did watch the video. I wouldn't worry about it but treating the ext perimeter of your house, high and low, would ease any concern I would have. Insecticides with the active ingredient: fipronil would be an ideal choice for ants around the exterior. Not labeled for interior treatment. Bifenthrin would be another active ingredient that would be my second choice.

Ant bait granules would be a low impact treatment that would target ants specifically.