I have written this as I love .webms, .gifs etc and everytime I should manually download them.
This REST API parse your thread URL and return a JSON with all webm files related to thread.
To obtain webm links you should make request to url
http://goarparser.com/parse_data
with parameter
{
"thread_link": "https://2ch.hk/{board_name}/res/{thread_id}.json"
}
Response:
{
"Files": [
{
"name": "{webm_id}.webm",
"path": "....webm",
"thumbnail": "....jpg"
},
]
}