This vid helps Fix YouTube 400 error while opening YouTube via Chrome.
Solution 1: Step 1: Try resetting your Chrome browser. See instructions@ bit.ly/2fkM454. Note: You will have to re-enable your extensions and/or theme you're using. Step 2: Try using another Chrome User profile.
Solution 2: Head to Chrome cache folder and delete all the files and folders from there.
Solution 3: Make the best of the "Content settings" function in Google Chrome.
Here're the steps you need to perform: 1. Type the word "youtube" in the Search cookies. 2. Remove the cookies on Youtube or just click "REMOVE ALL".
Other voices: 1. Make sure your Chrome or computer is malware-free. To do so, we suggest that you run the recommended avast Internet Security in this video guide. 2. Clear local cache and cookies - please do back up any personal stuff like saved passwords first.
3. Try accessing YouTube in Chrome's incognito mode. If this works for you, disable installed extensions one by one. For instance, UBlock Origin is the most likely due to its method of operation.
If that's not the case, try running Chrome Canary@ bit.ly/1ChTx3u. 4. Try turning off Chrome's hardware acceleration and then check.