方法如下：
1.打開瀏覽器，搜索VideoDownloadHelper；
/iknow-pic.cdn.bcebos.買粉絲/4afbfbedab64034fdbd0b178a3c379310a551daa"target="_blank"title="點擊查看大圖"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.買粉絲/4afbfbedab64034fdbd0b178a3c379310a551daa?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_買粉絲"esrc="買粉絲s://iknow-pic.cdn.bcebos.買粉絲/4afbfbedab64034fdbd0b178a3c379310a551daa"/>
2.點擊安裝插件；
/iknow-pic.cdn.bcebos.買粉絲/4afbfbedab64034fdbfeb178a3c379310a551d98"target="_blank"title="點擊查看大圖"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.買粉絲/4afbfbedab64034fdbfeb178a3c379310a551d98?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_買粉絲"esrc="買粉絲s://iknow-pic.cdn.bcebos.買粉絲/4afbfbedab64034fdbfeb178a3c379310a551d98"/>
3.點擊想要下載的視頻；
/iknow-pic.cdn.bcebos.買粉絲/e61190ef76c6a7eff72bda58f1faaf51f3de66ba"target="_blank"title="點擊查看大圖"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.買粉絲/e61190ef76c6a7eff72bda58f1faaf51f3de66ba?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_買粉絲"esrc="買粉絲s://iknow-pic.cdn.bcebos.買粉絲/e61190ef76c6a7eff72bda58f1faaf51f3de66ba"/>
4.點擊Download，選擇保存路徑；
/iknow-pic.cdn.bcebos.買粉絲/71cf3bc79f3df8dcbe7dfdefc111728b4710280f"target="_blank"title="點擊查看大圖"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.買粉絲/71cf3bc79f3df8dcbe7dfdefc111728b4710280f?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_買粉絲"esrc="買粉絲s://iknow-pic.cdn.bcebos.買粉絲/71cf3bc79f3df8dcbe7dfdefc111728b4710280f"/>
/iknow-pic.cdn.bcebos.買粉絲/aa18972bd40735fa698d3cc792510fb30f24084a"target="_blank"title="點擊查看大圖"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.買粉絲/aa18972bd40735fa698d3cc792510fb30f24084a?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_買粉絲"esrc="買粉絲s://iknow-pic.cdn.bcebos.買粉絲/aa18972bd40735fa698d3cc792510fb30f24084a"/>
5這樣視頻就保存好了。
/iknow-pic.cdn.bcebos.買粉絲/bf096b63f6246b60f88ccf0ae7f81a4c500fa2ca"target="_blank"title="點擊查看大圖"class="ikqb_img_alink">/iknow-pic.cdn.bcebos.買粉絲/bf096b63f6246b60f88ccf0ae7f81a4c500fa2ca?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_買粉絲"esrc="買粉絲s://iknow-pic.cdn.bcebos.買粉絲/bf096b63f6246b60f88ccf0ae7f81a4c500fa2ca"/>