Simple project to analyze the outcome of Google Takeout's YouTube data. There are two main things I'm interested in: watch history and the watch later playlist.
After a search on Stack Overflow, it became clear that YouTube API v3 doesn't provide a way to access these two special playlists. Eventually, however, I found someone suggesting using Google Takeout for that, so I decided to give it a try.
Extract your YouTube data via Takeout. I advise deselecting "videos" and "music-uploads" to make the final zip leaner.
Once the data is ready, download and unzip it. Move the Takeout folder inside this repository so the scripts here can find it.
These are Node.js scripts, so you need to setup the environment before continuing. I recommend using nvm to manage your installed Node.js version. Once nvm is installed, run the following command inside this folder:
nvm i
This will download and install the correct Node.js version. After that, run npm to install dependencies:
npm i
And you're ready to go.
The following scripts will analyze your watch history data:
node watch-history-digestprints a summary of statistics about your watch history;node watch-history-count-by-year-monthdumps the count of videos watched month by month;node watch-history-top-channelsdumps the list of channels most watched by you;node watch-history-top-videosdumps the list of videos most watched by you;node watch-history-channel-progressionfinds the top K most watched channels in your history data and then dumps a CSV file showing your how many views you had on each channel throughout time. This is an interesting analysis to show your channel watching habits as years go by;node watch-history-channel <channel-name>receives a channel name (can be a partial match) as input and outputs the whole list of videos you watched on that channel;node watch-history-channel-cumulative-viewssimilar to the channel progression script, but accumulates views from previous months so you can see the total number of views each channel has as time progresses. This is the ideal input for bar chart race generators like alienart.io;node watch-history-channel-cumulative-views durationthis is a variation of the above where channels are ranked by minutes watched, not views. More on that in the bar chart race section.
I use the watch later playlist a lot to mark videos that YouTube suggested to me so I can watch them... later. The problem is that the list grows quickly out of control. Even after I watch some of those videos, they still stay there cluttering the list. The YouTube UI lacks usability to manage playlists, so my idea here is to study ways to cleanup the list and collect only the videos I still want to watch.
The Takeout watch later list contains only video ids, so we need to fetch video data from the YouTube API. For that, you need to obtain a developer key in order to be able to call YouTube APIs. The full instructions can be seen here. You need just an API key, not OAuth authorization. Once you have a project with YouTube API access, create a key here. Click the "Create credentials" and add a new API key.
Copy the new key and paste it into a new file named api.key in this folder. Finally, run the script:
node watch-later-digest
A cache file named watch-later.json will be created (together with watch-later.sha1, which will be used to detect future changes and invalidate the cache).
After that, the following scripts can be used:
node watch-later-top-channelslists the most popular channels on your watch later list;node watch-later-csvdumps a CSV file containing all the videos in your watch later list so you can take a good look at them.
The node watch-history-channel-cumulative-views commands offers an output that is suitable for bar chart race generators like alienart.io.
The duration modifier is probably the most interesting, as it will show approximately how many minutes you spent watching each channel. The final number is not exact because YouTube does not store how many minutes of each video you actually watched. The script simply uses the total duration of each video.
Using the video duration poses a problem because some channels stream live for hours and hours non-stop. If you've watched one of those channels, it will probably dominate the output. To circumvent that problem, the script caps videos durations at a maximum number of minutes (check the constant CAP_VIEWS_IN_MINUTES_AT).
The output of the script can be directly saved to a csv file like this:
node watch-history-channel-cumulative-views duration > watch-history-channel-cumulative-minutes.csv
The first row has the channel names and the second one the channel thumbnail URLs. The following rows are the actual duration data.
If you are using alienart.io, you may want to convert the file from UTF-8 to ISO-8859-1 first, otherwise channel names with diacritics will appear broken in the video.