Young Sheldon S03e08 1080p Bluray →

The proper article for would be:

If you're looking for a (the word "the") to use before it in a sentence, it would be: young sheldon s03e08 1080p bluray

(using a capital 'B' and 'R' in BluRay, or "Blu-ray" if you prefer the hyphenated form). The proper article for would be: If you're