,
There are two primary ways of triggering a sequence. You can drop a Sequence Actor in the level and use the above mentioned method (also see here). You can also use the “[Create Level Sequence Player][2]” node to play a sequence that has no level sequence actor (sort of like spawning one to play on the fly).
I’d like to note that there was some refactoring to how Create Level Sequence Player works in 4.15. There are some known issues when using it in 4.14.
If it isn’t playing, for any reason, please make a new Answerhub thread about it as this one is rather old. There may be a more specific reason it isn’t working for you.