Google Photos and Amazon Photos
Google Photos and Amazon Photos are similar in many aspects, and not as well suited to long-form movies and videos as their sister "Drive" sites, above. For example, while they do allow at least some long-form video storage and playback, they treat a long-form movie the same as a photo. This makes them hard to organize and they give up many features addressed above. It also seems that long movie viewing resolution is sometimes downgraded in playback.
When online help topics note that both sites can be used for storing photos and videos, they're usually addressing shorter videos shot on a digital camera or your phone after about 2010. They are usually not addressing 1 hour or 2 hour converted 8mm, VHS analog, or digital tapes.
Pros of storing movies/videos here: You can do it and Google Photos, at least, may do so for free though we've not tried 100gb of movies as we have on Google Drive.
Cons: Hard to organize as they are stored in date order, not by file name; they may play at a lower resolution than optimal; and they have no special features addressed in sites above.
Difference between Amazon Photos and Amazon Drive