Most major launches from the Cape are live-streamed either by NASA or SpaceX or both. We usually set up a phone or iPad showing the livestream while sitting out front waiting to see if we can spot it - keeps you up on what's going on and when to squint hard to try to find it if daytime. There are several apps that will give you advance notice of launches (one was linked in a post above) and some of those will take you directly to a livestream.
NASA - YouTube
SpaceX - YouTube