It depends. For instance, live sports events in themselves are not protected by copyright. Hence, you will not infringe copyright by taking and uploading photos and videos that you took at the sports event itself.

On the other hand, broadcasts of sports events are protected by copyright. If you take videos of these broadcasts, and upload them onto your personal website/blog, you will infringe copyright in the broadcasts.

As for live concerts, if you take videos at the concerts themselves, you run the risk of infringing the underlying musical and literary works when you upload them onto your website/blog.

However, there may not be copyright infringement if your use of the publication falls within the “fair use" exception under sections 190 – 194 of the Copyright Act. “Fair use” includes situations of news reporting and criticisms or review. For such uses, you will need to make a sufficient acknowledgement of the work used.