I'd posit that negligent discharges are less likely with revolvers, for two reasons.

First, virtually all revolvers are a pretty darn heavy trigger pull in DA, which makes it relatively hard for it to go off when carelessly holstered or otherwise mishandled. And after every shot, they "revert" to DA operation until you manually cock the hammer, so it takes an effort to render them less safe. In contrast, many semi-auto pistols can have pretty light and snappy trigger pulls in SA mode, and need to be decocked manually (if possible at all).

Secondly, semi-autos do have the "mag removed but one in the chamber" failure mode that is probably the most common cause of NDs recorded on Youtube. Some semi-autos have loaded chamber indicators or magazine safeties, but that's not a rule.

As for failures... eh, it's a debate as old as semi-autos. But you know, I had my share of jams in semi-autos, and probably so did most seasoned semi-auto owners. "Wrong" ammo, limp-wristing, dirty or damaged extractors, dirt on the rails, etc. I can't say I even had a malfunction in a modern revolver, except for some getting blown to bits by Bubba's pissin' hot reloads.