The scene has the team watching the blog of someone who does instructional videos for braiding hair. Steve has recorded a response thanking the blog for helping him with his "friend's" hair. Bucky is shown from the back, and Steve demonstrates some of the techniques he's learned, and Bucky gets more and more relaxed as Steve works with his hair. The blogger is squeeing "Captain American responded to my blog!" and squishing her cat.
Thanks for your help1