Are you allowed to link youtube videos in your scratch signature or is that not allowed because I have a youtube link in my signature and I am wondering if it is allowed.

Youtube is allowed as long as you don't link livestreams or inappropriate content.

Here's a quote from the Questions about Scratch Directory that should hopefully answer your question:

xXRedTheCoderXx wrote:

Q: What are the rules for sharing social media / livestreams?
A: Sharing YouTube videos is allowed as long as the content and comments are for all ages and don't share personal information. Those same rules must be followed when linking YouTube channels, as well. Due to containing unmoderated chat, links to live streams or channels with live streams are not allowed. The description and about me of the YouTube channel and YouTube video also must not link to anything that is not for all ages, contains private information, contains private messaging, or contains unmoderated chat.
-snip-
If you have a question about what is allowed regarding social media, you can ask a question here in the forums or use Contact Us.

So no worries, that YouTube video should be allowed.

It's also notable that YouTube videos cannot be used as the sole purpose of the topic. For more information, check out this sticky.

what about wiki links? im working on an object show and just made a wiki for it, and im wondering if i can link it in my what im working on.

Topic closed to prevent necroposts.