c'est pour cela que je suis née

STEP 1: Take a screencap of the video, preferably while it's playing so that the PLAY button isn't blocking the image.

STEP 2: Reverse image search of choice. To my chagrin, I tend to end up resorting to Google's Search by image because Tineye keeps failing me and I haven't gotten around to doing a deep dive into currently available reverse image search services.

If you use the Firefox desktop web browser (untested: other desktop web browsers, Firefox mobile web browser) you can combine STEP 1 & STEP 2: Feel free to repost the video to Tumblr first, preferably as a draft or private post to prevent people from reblogging the uncredited vid, because this method doesn't work as well on Reddit videos.

Right-Click on the video. In the right-click menu, look for "Image Search Options" and hover over it to bring up a list of search options. I'll have to try out some of the other options later, but for this demonstration I used Google.

The search engine should open in another tab.

STEP 3: The Search. This part will be a mix of luck, tenaciousness, and deductive skills.

For Google, I recommend going to the "Exact matches" tab because it presents matches and their information in a much more condensed format than the other tabs. "Exact matches" is a misnomer, as is apparent in the screencap below. This search actually pulled up images from at least two separate videos by the same woman hanging from the same tree: one where she's wearing a slate grey pencil skirt and blazer (as in the video reposted by OP) and one where she's wearing a pale grey long-sleeved dress.

Ideally, a functional search engine would let you sort results by useful variables such as "date posted". Google is not such a search engine, and with its progressive enshittification you may or may not be able to bully Search by image into limiting results to certain date ranges. Luckily, these videos have been less flagrantly reposted than some, so I didn't have to scroll through too many.

When searching for a source, one of the primary things to pay attention to is date. Obviously, the original source has to be older than any of the reports. Unfortunately, not all the Google results have dates, so the earliest dated video isn't guaranteed to be the original.

In this case, the earliest result was of the grey dress video variant posted on Instagram on Jan 17, 2026. However, upon checking the link it became apparently that the Instagram account was not the originator of the video and their repost was unsourced.

If the date check fails you, keep an eye out for any undated results that clearly stand out from the rest. In this case, I picked up on the following:

Which has the following unique traits:

A new outfit! This is the only result that features the woman in a pale brown blazer and pencil skirt.

Dimensions. This result is 1080 x 1920, while the majority of results were smaller in size. Reposts are more likely to be downscaled from the original than upscaled, so if the initial date-check fails you, you're better off checking the largest undated results first.

Specific username (Liang Li (@liangli521)). A lot of the other results just have captions or titles in various languages. Depending on the website, these are usually either captioned reposts or random search terms that don't even link to the actual video. Results with specific usernames are rarer and thus worth checking out, though some of them may turn out to be reposters.

In this case, I hit the jackpot! There they all were: OP's video, the grey dress video, the brown blazer & skirt video, and many, many more!

Legitimately, Liang Li's whole thing seems to be going ham in skirts, dresses, and frequently heels. Possibly for advertising purposes? Very beautiful. Very powerful.

Bonus videos:

Cool lights!

Obstacle courses and playgrounds with friend!

H-hot damn, ma'am...