- YouTube releases its regional leaderboard.
Britannia Good Day Surprise Pack Tamil ad garnered 880,948 views.
This list of the top 10 most-watched ads spanning the first half of 2021 encompasses advertising in four regional Indian languages and continues to indicate an increasing recognition by marketers that consumers are more likely to consider a purchase when they are reached in their preferred language.
| Ad | Language | Link | Brand | Public Lifetime Global Views |
| Britannia Good Day Surprise Pack - Cool as a cucumber Feat. Gautham Vasudev Menon | Tamil | | Britannia Good Day | 880,948 |
| Sonalika Mahabali RX 42 - India’s 1st Puddling Special Tractor | Sonalika Tractors | Telugu | | Sonalika Tractors India | 637,468 |
| இனி English கத்துக்கலாம் WhatsApp-லயே | PARATTAI PUGAZH | Sivaangi Krishnakumar | English Partner | Tamil | | English Partner | 927,536 |
| Ola Autovin home delivery | Tamil Brand Film | Tamil | | Ola | 589,378 |
| VCare Skin Whitening Soap - Tamil AD | Tamil | | VCARE | 86,901 |
| Goodknight Fabric Roll-On | #SocialDistancingFromMosquitoes | Bengali (30 sec) | Bengali | | Goodknight | 168,013 |
| Bisleri Camel School 30Sec -Bengali #SamjhdaarBisleriPeeteHain | Bengali | | Bisleri India | 80,838 |
| Goodknight thanks every woman for their #PyaarWaliProtection | Bengali | Bengali: | | Goodknight | 60,591 |
| Sunfeast YiPPee! Saucy Masala- The new YiPPee!’s Saucy Googly 30 SEC (Malayalam) | Malayalam | | Sunfeast YiPPee! | 108,816 |
| দ্রুত এবং স্বাস্থ্যকর অঙ্কুরোদগম, এটি ছত্রাকের সংক্রমণ রোধ করে। | Bengali | | Indofil Industries Limited | 55,751 |