YouTube/Safari and Sierra Beta

[Kashchei]

I installed the Sierra Beta and my YouTube links now do not play (there is an error message in Safari saying that the video is not supported in this browser). Is this because of Flash being turned off in Safari, and if so, how do I fix this?

 

[grahamperrin]

Please give the address of an affected page.

 

[Kashchei]

Please give the address of an affected page.

Here the URL for one of most YouTube pages that don't work:

 

[grahamperrin]

Oh my giddy aunt now I'm sorry I asked I'll look at it later

 

[Kashchei]

Oh my giddy aunt now I'm sorry I asked I'll look at it later

This was the first youtube video that came up on Reddit when I looked to post a link here. Please don't think this is the driving force behind my wanting to fix this problem!

 

[mastercheif91]

Do you have clicktoplugin installed?

 

[Kashchei]

Do you have clicktoplugin installed?

No, I don't