Yeah. I’m well aware of this because I’m on satellite and it really cuts into my monthly 16 gig.
Ah. Gotcha. Yeah I’m on cable and have a 100MB download speed with no cap so I have no issues with buffering. Wanted to go with Satellite for television but the Internet speed was just too slow.
Other things you can try that are suggested here is to switch browser to Chrome (I use Firefox as I, ironically, discovered that over time Chrome had issues with YouTube).
Also, set your browser settings to clear the cache on close or manually clear it frequently. A “clogged” cache can really screw it up.
But it may be absolutely no more than “bigger” videos that outstrip your download speed.