To ensure (kind of) that your BT speaker/headphones will be able to work with video, check they implement "AptX low latency".
However, as they mention in the video, there are lots of ways this could fail: application playback issue, BT transmitter issue (although anything from the last few years should be able to handle this properly) or receiver issue (the most likely cause in older or cheap speakers).
https://www.youtube.com/watch?v=eYW4J6FyyZU
To ensure (kind of) that your BT speaker/headphones will be able to work with video, check they implement "AptX low latency".
However, as they mention in the video, there are lots of ways this could fail: application playback issue, BT transmitter issue (although anything from the last few years should be able to handle this properly) or receiver issue (the most likely cause in older or cheap speakers).