Youtube has recently made it so that even with adblock, there is an unskippable pause before some videos, as if an invisible ad is playing. However, there is a way to get around this.
Youtube-dl is a tool which allows the user to download video from youtube and other sies from the terminal without a web browser. In order to use this tool normally, just type in
youtube-dl [url of youtube video page]
This will download the video to the current directory. However, in order to stream the video, the following command should be used:
youtube-dl -o - [url] | [media player]
This will stream the youtube video to whichever media player specified, for example vlc or mplayer.
I hope this helps!