There's a few YouTube channels that provide live feeds of LAX. They operate a few times a week, usually during the late morning to early evening hours pacific time.
There's also ones at ORD, ATL and occasionally other US airports. I've seen a few popup in other countries too, but can't seem to find them in you YouTube history.
https://youtu.be/nPsaWA2HkCY - Reagan National Airport (DCA) - Occasional V22 Osprey and Blackhawks
https://youtu.be/bqiZ2xih6Jk - Prague (PRG) - Nice mix of big international jets and small local flights
https://youtu.be/z5lYsvOwxHI - Lake Hood Seaplane Base - Constant seaplane action during the warm months, and heavy cargo flights from ANC
https://youtu.be/7jMqwnKIfWA - Naha Aiport (OKA) - Constant traffic and the occasional fighter sortie from the JASDF airbase