This is a component of fly tying that has truly escalated the sport in recent years. There can be much to gain when using the following, as the key is to collaborate and connect with others. Social Media is an area that I continue to explore, and "Trout and Feather" can be located on both Facebook and Instagram.
I personally know the power of YouTube, but underestimated its ability to connect others. When learning new patterns and techniques, this is typically the first place I start.
This website is frequented by many knowledgeable tyers interacting with one another daily. The content discussed is excellent, and others are always encouraged to join in the discussion. I recommend creating a free account, and jumping right in!
On Reddit, individuals post and respond to messages, similar to other forums, though this site is really one geared to beginners, IMO. The comments are positive, and constructive feedback is given, especially when asked. This site was a little tough to learn originally, but most importantly, encourages interactions with others. There is also a "Reddit Fly Fishing" site, plus others related to our sport.
Orvis is a name recognized for years in fly fishing, and their current lineup of videos is an excellent resource for all levels of fly tying and fly fishing.
This innovative site, created by Dr. Roger Maves, is packed with so much information. Dr. Maves interviews established fly fishing and fly tying professionals on live Internet, and additionally saves the show to the site. With a subscription, you can listen to any of the recorded shows (over 200!), and even download them to your computer.