So, the channel apparently got hacked by some very bad people who launched a stream about something cryptocurrency-related. It got swiftly reported and taken down.
Now, I don't really want to fuel the shitstorm which is probably going to erupt in this subreddit and add to the flood of posts that is about to happen here, but I feel like I should make this post. I sincerely hope the channel can be fully restored, because it would be a tragedy for the fan community to lose such a talented animator and their artwork. Let's just keep calm and see what happens.
However, just in case, I hurried to download all the videos from the channel once I realized what's going on, so the community wouldn't lose these gems if the worst happens. I used a free online tool, so not all of them are top possible quality due to download size limitations, but all of them are at least FullHD or above. There are all of them, not only Half Life related.
Here's the link to my Google Drive folder which I made public: TheParryGod's video archive.
Let us hope the situation will be resolved and all will be well.