Most House security cameras typically keep footage for 30 days to 90 days, although the exact duration can vary depending on the specific case like your local storage capacity or if any cloud storage is supported.
For example, eufy cameras -
S330 eufyCam security camera allows 3 months of storage time, but when your recordings reach its built-in 16GB EMMC space, your old footage is automatically replaced by new recordings. And if you make any monthly or yearly subscription, the footage may last longer in your cameras for home security.