Nap and bed time

So my boy turned a year old. Ever since hes had trouble sleeping and napping- possibly from quarantine? Anyway, he’s getting too long for me to hold him and he’s

unable to get comfortable. we’ve tried laying him in the crib drowsy enough for him to fall asleep; it had worked a couple times but lately instead of crying it out where you can find advice everywhere on the internet, he will just go around in the crib and just wear himself out (crawling around, standing up laying back down) .. he’s clearly tired and ready for his nap having been up for atleast 3 hrs or so... so my question is how long do you let this go before you intervene and try to help them fall asleep or do you let them go until they either begin to cry because they’re not ready for a nap or do you let them put self to sleep???