Adsoftheworld.com is a decent site, but those are with good production and not really what you're looking for probably. Facebook ad library, if you know the company which uses those or similar ads. If you know an agency that creates that style of ads, you can also check their client Facebook ad libraries. Some of them will have the biggest clients listed on their website so you might get lucky, if you don't know any specific company you're looking for. One agency I researched like this was thesis testing. Went to their site, they have the biggest clients listed, then found them on fb ad library and checked the ads out. Tiktok also has a new ads center, but that thing has been buggy so haven't got around to using it yet. Could be good if it works now. More on reddit.com

Sounds like an awesome idea! Search engine companies put priority on video content when using algorithms that present certain sites higher in ranking on the page. Presenting videos via social media channels, posting them on blogs and embedding them on your website (if you have one) that increases the likelihood that your target will find you when searching online for relevant information. Using videos works! Video sites, including Facebook and YouTube, include features that allow you to see how your content performs. Knowing the views, shares, likes and social interactions can help you plan future campaigns, which makes your content more effective at reaching your target audience. Social media has come a long way in helping business grow by watching the statistics and learning from mistakes of what works and doesn't. Hope this helps. More on reddit.com