With completely wireless earbuds, the rule is: when the battery fails, they have to be disposed of. Not so with the Fairbuds, that allow you to replace batteries in just a few seconds. Combined with a repairable design, the earbuds should therefore have an extremely long lifetime.
Bluetooth headphones are unusable for videos and games if they only support high latency codecs.
Then don’t use them for that or don’t buy them.