They're 4K@30fps, in x264, so yeah I'd download instead of stream. Also choose your player wisely, seem to be jerky in MPV but fine in VLC.
If they're lagging maybe your device(probably PC) can't run 4K videos easily.
Fantastic upload by the way,
ImNotYassine do you by any chance have more from this dude or maybe the Dubsie fuck video?