Best way to connect two remote Pi's

Hey, hope your doing well. So I will describe the situation I have and explain my problem. There is an Pi5 (has wifi and net power) that acts as an server somewhere deep in a building. And then outside there is a zero 2W that is connected to an camera( has no wifi and powered by batery) . How would I stream the video from the zero 2w to my server. There like 200 meters apart separated through doors and walls. I have thought of the following solutions. - Wfif bridge - High-Gain WiFi Antennas( If possible??) - Radio waves

All would work it just depends on reliability and cost

High-gain antenna, then you need to add a "USB Wi-Fi" network card as some of those has a "External antenna". This is because the Wi-Fi antenna is integrated and has no possibility for a external antenna.