Here's a quick tip Uncle Dave:
When you encounter a YouTube link, open it up in a new window, wait for it to load the page completely and and start buffering (maybe 15 sec) and then simply set the video volume slider to zero so it won't bother you, and return to whatever you were doing in other windows....
after reading some other comments on Synthzone, return to the video window and click and replay, the whole thing will be buffered and you will watch this without nerve cracking delays.
Sometimes i open 3-4 separate youTube pages like that and continue my work...after some minutes, all the videos are loaded, and it's showtime.
Theodore