Error type: "Forbidden". Error message: "Access Not Configured. YouTube Data API has not been used in project 548160373988 before or it is disabled. Enable it by visiting https://console.developers.google.com/apis/api/youtube/overview?project=548160373988 then retry. If you enabled this API recently, wait a few minutes for the action to propagate to our systems and retry." Domain: "usageLimits". Reason: "accessNotConfigured".
Did you added your own Google API key? Look at the help
Check in YouTube if the id sagarmathatvnepal
belongs to a username. Check the FAQ
of the plugin or send error messages to support