Downloading “reddit” dataset keeps timing out.
Hi ! Since https://github.com/huggingface/datasets/pull/2803 we've changed the time out from 10sec to 100sec.
This should prevent the `ReadTimeoutError`. Feel free to try it out by installing `datasets` from source
```
pip install git+https://github.com/huggingface/datasets.git
```

When re-running your code you said you get a `OSError`, could you try deleting the file at the path returned by the error ? (the one after `[Errno 20] Not a directory:`). Ideally when a download fails you should be able to re-run it without error; there might be an issue here.

Finally not sure what we can do about `ConnectionError`, this must be an issue from zenodo. If it happens you simply need to try again

## Describe the bug
A clear and concise description of what the bug is.
Everytime I try and download the reddit dataset it times out before finishing and I have to try again.

There is some timeout error that I will post once it happens again.

## Steps to reproduce the bug
```python
from datasets import load_dataset

dataset = load_dataset("reddit", ignore_verifications=True, cache_dir="/Volumes/My Passport for Mac/og-chat-data")
```

## Expected results
A clear and concise description of the expected results.

I would expect the download to finish, or at least provide a parameter to extend the read timeout window.

## Actual results
Specify the actual results or traceback.

Shown below in error message.

## Environment info
<!-- You can run the command `datasets-cli env` and copy-and-paste its output below. -->
- `datasets` version:  1.11.0
- Platform: macOS 
- Python version: 3.9.6 (conda env)
- PyArrow version: N/A

Downloading “reddit” dataset keeps timing out. 
 ## Describe the bug
A clear and concise description of what the bug is.
Everytime I try and download the reddit dataset it times out before finishing and I have to try again.

There is some timeout error that I will post once it happens again.

## Steps to reproduce the bug
```python
from datasets import load_dataset

dataset = load_dataset("reddit", ignore_verifications=True, cache_dir="/Volumes/My Passport for Mac/og-chat-data")
```

## Expected results
A clear and concise description of the expected results.

I would expect the download to finish, or at least provide a parameter to extend the read timeout window.

## Actual results
Specify the actual results or traceback.

Shown below in error message.

## Environment info
<!-- You can run the command `datasets-cli env` and copy-and-paste its output below. -->
- `datasets` version:  1.11.0
- Platform: macOS 
- Python version: 3.9.6 (conda env)
- PyArrow version: N/A
 
 Hi ! Since https://github.com/huggingface/datasets/pull/2803 we've changed the time out from 10sec to 100sec.
This should prevent the `ReadTimeoutError`. Feel free to try it out by installing `datasets` from source
```
pip install git+https://github.com/huggingface/datasets.git
```

When re-running your code you said you get a `OSError`, could you try deleting the file at the path returned by the error ? (the one after `[Errno 20] Not a directory:`). Ideally when a download fails you should be able to re-run it without error; there might be an issue here.

Finally not sure what we can do about `ConnectionError`, this must be an issue from zenodo. If it happens you simply need to try again
