Xuân Hiếu
Why it exists
On these courses, questions live inside the lesson video. They appear only when the video reaches a fixed timestamp. To answer the third question, you first wait through the first and the second.
That design makes sense on paper. In practice, many learners study in the evening after a full working day, on an old laptop or on a phone once the house is quiet. Their time is not lost to learning. It is lost to waiting.
I cannot change the course content, and I should not. I only removed the waiting. Every question is visible from the start, and a small panel shows whether the lesson meets its completion requirements yet.
What it does
Shows in-video questions up front. The extension turns off the question timestamps and lists every question in order under the video. You can read ahead, think, and answer when ready. A switch restores the platform's original behaviour.
A compact question board. Each question is a button marked not submitted, submitted, or wrong (on courses that show results). Clicking a button scrolls to that question.
Live completion tracking. The panel follows video completion and the number of submitted questions while you study. On courses that hide results it only says "submitted, result hidden" and never assumes you were right.
Video speed. The free version has 1x and 2x; Pro adds 4x, 8x and 16x, applied directly to the player. Video starts muted so it does not disturb people nearby.
Keeps playing in a background tab. You can open reading material in another tab without returning to press play.
Optional auto-advance. Off by default. When on, it counts down three seconds before pressing "Next", with a Cancel button.
A panel that stays out of the way. Drag to move, drag the edge to resize, minimise when not needed. Its position is remembered.
Free and Pro
The free version already tracks the lesson requirements, navigates questions, advances lessons and plays video at 1x and 2x. Pro adds what matters most: every question listed under the video up front, and 4x, 8x, 16x speed. Each device gets a 24-hour Pro trial for one course. Pro plans range from 9,000 VND (1 day) to 299,000 VND (lifetime); full pricing and activation are on the product page on 1x (Vietnamese).
What it does not do
- It never picks or submits answers. Answer guessing was removed entirely in v1.6.0. You still read each question and choose the answer.
- It does not know the right answers. It only knows which questions you submitted. Passing depends on your answers.
- It sends no learning data anywhere. Settings and the panel position are stored in your browser.
A course exists so that you understand something. This tool removes the waiting, not the learning. If the material is new to you, watch it at a speed you can follow.
Privacy and permissions
| Permission | Why |
|---|---|
activeTab |
Work on the tab you have open |
| Course pages | Read and arrange the questions in a lesson |
| youtube.com, youtube-nocookie.com | Set speed and keep the embedded player running |
No account, no tracking. The extension only contacts the licence server at 1x.xuanhieu.org when you start the trial, activate a key or use Pro features; it sends a device id, the open course id, the key, the browser type and the version number. Answers and learning progress are not sent.
Install
The extension runs in two ways.
In Chrome
- Download the extension package, version 1.9.1 (.zip) and unzip it.
- Open
chrome://extensionsand switch on Developer mode. - Click Load unpacked and choose the unzipped folder.
- Open a lesson of the course. The BDHVS Pro panel appears.
With Tampermonkey
If your browser has Tampermonkey, open the userscript file to install it. The userscript has the free features; the trial and Pro need the Chrome extension.
The package is always the latest version at 1x.xuanhieu.org/bdhvs/download. For the userscript, or if installation fails, write to mail@xuanhieu.org.
Recent versions
- 1.9.0 and 1.9.1: free version plus Pro plans, a 24-hour Pro trial, activation with a BDH-… key.
- 1.8.0: About tab in the panel, new brand lockup, minimise button fixed.
- 1.7.0: author branding and icons, packaged as the official release.
- Between 1.6.0 and 1.7.0: panel can be dragged and resized; text scales with its width.
- 1.6.0: questions shown up front; answer guessing and auto-submit removed.
Feedback
If the extension misbehaves on a course, send the course name, the lesson link and a screenshot to mail@xuanhieu.org. Courses on the platform change from one intake to the next, and those messages keep the tool working for the next learner.
