Low frame rate😕

All of the vids have a framerate of 1/1-1.5 frames per second or more on youtube and vemeo its like 1/5 fps:( On other formats I only get audio (which is fine on all formats).

Normally I use one of the fast computers at my college, but I won’t have access to those for a few weeks. Now the only computer I have access to is a Mac OS X. Is it just too slow?

I’m using os X right now and I just watched a youtube vid and a vimeo vid with no issues, so I don’t think its an OS problem.