It’s always a struggle to find good beds and backgrounds for your audio projects. There many “royalty-free’ music services these days, but most of them seem to have at least one foot in a “pay to play” business model. I had good luck browsing BeatPick, but ultimately, its Soundcloud that is the leader here. Here is a great little tutorial on the basics of searching for some great audio.
Jamboard has been around for awhile. This is a particularly “cinematic” promotional video that, while it does wax very poetic, does a decent job of highlighting some of Jams best features. In particular they are touting the benefits for creative brainstorming.
You will need a google account to take advantage of this tool.