Created Legacy API (markdown)

Legacy-API.md

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+These API endpoints are deprecated but still function. See the full API document at https://github.com/ajayyy/SponsorBlock/wiki/API-Docs/
+
+________________________________________________________________________________
+
+**GET** `/api/getVideoSponsorTimes`
+
+**Input**:
+```
+{
+  videoID: string
+}
+```
+
+**Response**:
+```
+{
+  sponsorTimes: array [float],
+  UUIDs: array [string] //The ID for this sponsor time, used to submit votes
+}
+```
+
+**Error codes**:
+
+404: Not Found
+
+__________________________________________________________________
+
+**GET** or **POST** `/api/postVideoSponsorTimes`
+
+**Input**:
+```
+{
+  videoID: string,
+  startTime: float,
+  endTime: float,
+  userID: string //This should be a randomly generated UUID stored locally (not the public one)
+}
+```
+
+**Response**:
+```
+{
+  Nothing (status code 200)
+}
+```
+
+**Error codes**:
+
+400: Bad Request (Your inputs are wrong/impossible)
+
+429: Rate Limit (Too many for the same user or IP)
+
+409: Duplicate