If I had a Coyote vehicle with the intermittent typewriter/bbq igniter sound that I've heard, I would be too worried and probably sell it/trade it for something different. Now my 2014 makes a slight ticking every revolution and comes from the passenger side, just like my 2013 did.. This seems to be very common, steady, and only after vehicle has warmed up. Some of these videos I've heard though.. oh man I would be so worried.
This is Ford's stance on 5.0 Coyotes with the noise:
2/5/2019 7718 - 2011-2019 Mustang/F-150 - 5.0L Tick Tap And/or Typewriter Noise At Idle
Some 2011-2019 Mustang and F-150 vehicles equipped with a 5.0L engine may exhibit a ticking noise at idle after an engine oil change. It is often referred to as typewriter noise because of its similarity to the sound of a mechanical typewriter. The noise in question may be heard on some engines when engine temperatures reach 150?F (65?C) or higher and engine speed is at idle up to approximately 1700 RPM's. It can typically be heard at the front wheel well, and is often isolated to the transmission bell housing or oil pan area. typewriter noise is not detrimental to engine function or durability and has no short or long term effects on the engine. This an operating characteristic of the 5.0L engine and no repairs should be attempted.